Playground-Fredy.md

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+Thoughts to Linked Data Types in relation to our [specification](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-service).
+
+# place.source.owner 
+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)
+