diff --git a/src/main/clj/dda/activity_pub_poc/json_ld.clj b/src/main/clj/dda/activity_pub_poc/json_ld.clj
index 09b7387..ae212ec 100644
--- a/src/main/clj/dda/activity_pub_poc/json_ld.clj
+++ b/src/main/clj/dda/activity_pub_poc/json_ld.clj
@@ -1,11 +1,14 @@
-(ns activity-pub-poc.json-ld
+(ns dda.activity-pub-poc.json-ld
   (:require
    [hato.client :as http]
+   [clojure.string :as str]
    [clojure.inspector :as ins]
    ))
 
 (def team-url "https://social.meissa-gmbh.de/users/team")
 
+(def context-cache (atom {}))
+
 (defn json-get [url]
   (:body 
    (http/get url
@@ -13,4 +16,38 @@
               :http-client {:redirect-policy :normal}
               :as :json-string-keys})))
 
-(ins/inspect-tree (json-get team-url))
\ No newline at end of file
+(defn fetch-context [url]
+  (if-let [ctx (get @context-cache url)]
+    ctx
+    (get
+     (swap! context-cache
+            (fn [cache]
+              (assoc cache url (get (json-get url) "@context"))))
+     url)))
+
+(defn expand-context
+  ([new-context]
+   (expand-context {} new-context))
+  ([current-context new-context]
+   (cond
+     (string? new-context)
+     (expand-context current-context (fetch-context new-context))
+
+     (sequential? new-context)
+     (reduce expand-context current-context new-context)
+
+     (map? new-context)
+     (into current-context
+           (map
+            (fn [[k v]]
+              (let [id (if (map? v) (get v "@id" v) v)
+                    [prefix suffix] (str/split id #":")]
+                (if-let [base (get (merge current-context new-context) prefix)]
+                  [k (assoc (if (map? v) v {})
+                            "@id" (str (if (map? base) (get base "@id") base)
+                                       suffix))]
+                  [k (if (map? v) v {"@id" v})]))))
+           new-context))))
+
+
+(expand-context (get (json-get team-url) "@context"))
diff --git a/src/test/activity_pub_poc/core_test.clj b/src/test/activity_pub_poc/core_test.clj
deleted file mode 100644
index ce34e7c..0000000
--- a/src/test/activity_pub_poc/core_test.clj
+++ /dev/null
@@ -1,7 +0,0 @@
-(ns activity-pub-poc.core-test
-  (:require [clojure.test :refer :all]
-            [activity-pub-poc.core :refer :all]))
-
-(deftest a-test
-  (testing "FIXME, I fail."
-    (is (= 0 1))))
diff --git a/src/test/clj/dda/activity_pub_poc/json_ld_test.clj b/src/test/clj/dda/activity_pub_poc/json_ld_test.clj
new file mode 100644
index 0000000..60b8810
--- /dev/null
+++ b/src/test/clj/dda/activity_pub_poc/json_ld_test.clj
@@ -0,0 +1,6 @@
+(ns dda.activity-pub-poc.json-ld-test
+  (:require [clojure.test :refer :all]
+            [dda.activity-pub-poc.json-ld :as sut]))
+
+(deftest get-property-type-from-ld-resource
+  (is (= 0 1)))