diff --git a/client/html/index.html b/client/html/index.html
index 32711fe..81888f3 100644
--- a/client/html/index.html
+++ b/client/html/index.html
@@ -20,7 +20,7 @@
                         <div class="panel-heading">
                             <big>Visualizer</big>
                             <div class="pull-right">
-                                <button class="btn btn-xs btn-default">Learn</button>
+                                <button class="btn btn-xs btn-default" id="learn">Learn</button>
                             </div>
                         </div>
                         <div class="panel-body">
diff --git a/client/scripts/application.js b/client/scripts/application.js
index f66504c..572f6dc 100644
--- a/client/scripts/application.js
+++ b/client/scripts/application.js
@@ -66,6 +66,27 @@
             });
 
             $('#historyIndex').on('slideStop', onSelectSnapshot);
+
+            $('#learn').click(function() {
+                var keyword = prompt('Input keyword to learn as');
+                if (name === null) {
+                    return;
+                }
+
+                var query = {
+                    keyword:  keyword,
+                    features: _ctx.query.features
+                };
+
+                $.getJSON('/add_keyword', query, function(results) {
+                    if (results.success) {
+
+                    }
+                    else {
+                        alert('Failed to learn keyword');
+                    }
+                });
+            });
         });
     }
 
diff --git a/server/search.js b/server/search.js
index 2c6a310..65de42a 100644
--- a/server/search.js
+++ b/server/search.js
@@ -133,32 +133,24 @@ function loadDb(params) {
 }
 
 function addKeyword(query, callback) {
-    // var keyword = (query.keyword || '').toLowerCase();
-    // if (!/^[a-zA-Z0-9]+$/.test(keyword)) {
-    //     callback({
-    //         keyword: keyword,
-    //         success: false
-    //     });
-    // }
-    // else {
-    //     getKeywords(function(keywords) {
-    //         var features = combine(keywords, query.params);
-    //         var values = [
-    //             keyword,
-    //             features.food || 0.0,
-    //             features.service || 0.0,
-    //             features.value || 0.0,
-    //             features.atmosphere || 0.0
-    //         ];
+    if (!/^[a-zA-Z0-9]+$/.test(query.keyword)) {
+        callback({ keyword: query.keyword, success: false });
+        return;
+    }
 
-    //         pool.query('INSERT INTO keywords VALUES(?, ?, ?, ?, ?)', values, function(err) {
-    //             callback({
-    //                 keyword: keyword,
-    //                 success: err === null
-    //             });
-    //         });
-    //     });
-    // }
+    getKeywords(function(keywords) {
+        var values = [
+            query.keyword,
+            query.features.food,
+            query.features.service,
+            query.features.value,
+            query.features.atmosphere
+        ];
+
+        pool.query('INSERT INTO keywords VALUES(?, ?, ?, ?, ?)', values, function(err) {
+            callback({ keyword: query.keyword, success: err === null });
+        });
+    });
 }
 
 function removeKeyword(query, callback) {