Playground-Fredy.md

@@ -4,5 +4,6 @@ Thoughts to Linked Data Types in relation to our [specification](https://www.w3.
 The owner could be a property [attributedto](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-attributedto)
 
 # place.source.platform 
-The plattform could be [generator](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-generator)
+The platform could be [generator](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-generator).  
+which is a [actor](https://www.w3.org/TR/activitystreams-vocabulary/#actor-types) e.g. an [Application](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-application) a [Service](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-service) or a [Organisation](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-organization)