Database: cre_Doc_and_collections (difficulty: simple)
Question: What is the collection name of a document owned by 'Marlin'?
SQL: SELECT T1.Collection_Name FROM Collections AS T1 JOIN Documents_in_Collections AS T2 ON T1.Collection_ID = T2.Collection_ID JOIN Document_Objects AS T3 ON T2.Document_object_id  =  T3.Document_object_id WHERE T3.owner  =  'Marlin'