diff --git a/firebase/functions/external/@worldbrain/memex-common b/firebase/functions/external/@worldbrain/memex-common
index 2981709..be9d48e 160000
--- a/firebase/functions/external/@worldbrain/memex-common
+++ b/firebase/functions/external/@worldbrain/memex-common
@@ -1 +1 @@
-Subproject commit 2981709e0eb327f6ae06f1ac053913c39fed7632
+Subproject commit be9d48eae73f73f2321067f9aa37f08d47ce282d
diff --git a/firebase/functions/package.json b/firebase/functions/package.json
index 7875136..88d82ff 100644
--- a/firebase/functions/package.json
+++ b/firebase/functions/package.json
@@ -35,6 +35,7 @@
         "getstream": "^6.2.1",
         "immutability-helper": "^3.1.1",
         "json-date-parser": "^1.0.1",
+        "linkedom": "^0.14.21",
         "lodash": "^4.17.20",
         "module-alias": "^2.2.2",
         "node-fetch": "^2.6.0",
@@ -63,7 +64,7 @@
         "chai": "^4.2.0",
         "firebase-functions-test": "^0.1.7",
         "firebase-tools": "^11.16.0",
-        "mocha": "^6.2.2", 
+        "mocha": "^6.2.2",
         "sinon": "^7.5.0",
         "sinon-chai": "^3.3.0",
         "ts-node": "^8.4.1",
diff --git a/firebase/functions/yarn.lock b/firebase/functions/yarn.lock
index 42e7f49..d4f9266 100644
--- a/firebase/functions/yarn.lock
+++ b/firebase/functions/yarn.lock
@@ -1704,6 +1704,11 @@ body-parser@1.20.0, body-parser@^1.18.3, body-parser@^1.19.0:
     type-is "~1.6.18"
     unpipe "1.0.0"
 
+boolbase@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
+  integrity sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==
+
 boxen@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/boxen/-/boxen-4.2.0.tgz#e411b62357d6d6d36587c8ac3d5d974daa070e64"
@@ -2347,6 +2352,17 @@ css-color-keywords@^1.0.0:
   resolved "https://registry.yarnpkg.com/css-color-keywords/-/css-color-keywords-1.0.0.tgz#fea2616dc676b2962686b3af8dbdbe180b244e05"
   integrity sha512-FyyrDHZKEjXDpNJYvVsV960FiqQyXc/LlYmsxl2BcdMb2WPx0OGRVgTg55rPSyLSNMqP52R9r8geSp7apN3Ofg==
 
+css-select@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/css-select/-/css-select-5.1.0.tgz#b8ebd6554c3637ccc76688804ad3f6a6fdaea8a6"
+  integrity sha512-nwoRF1rvRRnnCqqY7updORDsuqKzqYJ28+oSMaJMMgOauh3fvwHqMS7EZpIPqK8GL+g9mKxF1vP/ZjSeNjEVHg==
+  dependencies:
+    boolbase "^1.0.0"
+    css-what "^6.1.0"
+    domhandler "^5.0.2"
+    domutils "^3.0.1"
+    nth-check "^2.0.1"
+
 css-to-react-native@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/css-to-react-native/-/css-to-react-native-3.0.0.tgz#62dbe678072a824a689bcfee011fc96e02a7d756"
@@ -2356,6 +2372,16 @@ css-to-react-native@^3.0.0:
     css-color-keywords "^1.0.0"
     postcss-value-parser "^4.0.2"
 
+css-what@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/css-what/-/css-what-6.1.0.tgz#fb5effcf76f1ddea2c81bdfaa4de44e79bac70f4"
+  integrity sha512-HTUrgRJ7r4dsZKU6GjmpfRK1O76h97Z8MfS1G0FozR+oF2kG6Vfe8JE6zwrkbxigziPHinCJ+gCPjA9EaBDtRw==
+
+cssom@^0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/cssom/-/cssom-0.5.0.tgz#d254fa92cd8b6fbd83811b9fbaed34663cc17c36"
+  integrity sha512-iKuQcq+NdHqlAcwUY0o/HL69XQrUaQdMjmStJ8JFmUaiiQErlhrmuigkg/CU4E2J0IyUKUrMAgl36TvN67MqTw==
+
 csv-parse@^5.0.4:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/csv-parse/-/csv-parse-5.3.0.tgz#85cc02fc9d1c89bd1b02e69069c960f8b8064322"
@@ -3926,6 +3952,11 @@ hoist-non-react-statics@^3.0.0:
   dependencies:
     react-is "^16.7.0"
 
+html-escaper@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/html-escaper/-/html-escaper-3.0.3.tgz#4d336674652beb1dcbc29ef6b6ba7f6be6fdfed6"
+  integrity sha512-RuMffC89BOWQoY0WKGpIhn5gX3iI54O6nRA0yC124NYVtzjmFWBIiFd8M0x+ZdX0P9R4lADg1mgP8C7PxGOWuQ==
+
 html-to-react@^1.3.4:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/html-to-react/-/html-to-react-1.5.0.tgz#6e0cf47ae1b091ba2f28a3832389fbce4d199ccc"
@@ -3935,7 +3966,7 @@ html-to-react@^1.3.4:
     htmlparser2 "^8.0"
     lodash.camelcase "^4.3.0"
 
-htmlparser2@^8.0:
+htmlparser2@^8.0, htmlparser2@^8.0.1:
   version "8.0.1"
   resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-8.0.1.tgz#abaa985474fcefe269bc761a779b544d7196d010"
   integrity sha512-4lVbmc1diZC7GUJQtRQ5yBAeUCL1exyMwmForWkRLnwyzWBFxN633SALPMGYaWZvKe9j1pRZJpauvmxENSp/EA==
@@ -4737,6 +4768,17 @@ limiter@^1.1.5:
   resolved "https://registry.yarnpkg.com/limiter/-/limiter-1.1.5.tgz#8f92a25b3b16c6131293a0cc834b4a838a2aa7c2"
   integrity sha512-FWWMIEOxz3GwUI4Ts/IvgVy6LPvoMPgjMdQ185nN6psJyBJ4yOpzqm695/h5umdLJg2vW3GR5iG11MAkR2AzJA==
 
+linkedom@^0.14.21:
+  version "0.14.21"
+  resolved "https://registry.yarnpkg.com/linkedom/-/linkedom-0.14.21.tgz#878e1e5e88028cb1d57bc6262f84484a41a37497"
+  integrity sha512-V+c0AAFMTVJA2iAhrdd+u44lL0TjL6hBenVB061VQ6BHqTAHtXw1v5F1/CHGKtwg0OHm+hrGbepb9ZSFJ7lJkg==
+  dependencies:
+    css-select "^5.1.0"
+    cssom "^0.5.0"
+    html-escaper "^3.0.3"
+    htmlparser2 "^8.0.1"
+    uhyphen "^0.1.0"
+
 linkify-it@^3.0.1:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/linkify-it/-/linkify-it-3.0.3.tgz#a98baf44ce45a550efb4d49c769d07524cc2fa2e"
@@ -5487,6 +5529,13 @@ npmlog@^6.0.0:
     gauge "^4.0.3"
     set-blocking "^2.0.0"
 
+nth-check@^2.0.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-2.1.1.tgz#c9eab428effce36cd6b92c924bdb000ef1f1ed1d"
+  integrity sha512-lqjrjmaOoAnWfMmBPL+XNnynZh2+swxiX3WUE0s4yEHI6m+AwrK2UZOimIRl3X/4QctVqS8AiZjFqyOGrMXb/w==
+  dependencies:
+    boolbase "^1.0.0"
+
 number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
@@ -7204,6 +7253,11 @@ uglify-js@^3.7.7:
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.17.4.tgz#61678cf5fa3f5b7eb789bb345df29afb8257c22c"
   integrity sha512-T9q82TJI9e/C1TAxYvfb16xO120tMVFZrGA3f9/P4424DNu6ypK103y0GPFVa17yotwSyZW5iYXgjYHkGrJW/g==
 
+uhyphen@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/uhyphen/-/uhyphen-0.1.0.tgz#3cc22afa790daa802b9f6789f3583108d5b4a08c"
+  integrity sha512-o0QVGuFg24FK765Qdd5kk0zU/U4dEsCtN/GSiwNI9i8xsSVtjIAOdTaVhLwZ1nrbWxFVMxNDDl+9fednsOMsBw==
+
 ui-logic-core@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/ui-logic-core/-/ui-logic-core-0.2.1.tgz#00b903e3f83a75e3e6d7979aa387602d4363eab1"