Database: cre_Doc_and_collections
Question: List id of documents that in document subset Best for 2000 and collection named Best.
SQL:
SELECT DISTINCT T1.Document_Object_ID FROM Document_Subset_Members AS T1 JOIN Document_Subsets AS T2 ON T1.Document_Subset_ID =  T2.Document_Subset_ID JOIN Documents_in_Collections AS T3 ON T1.Document_Object_ID  =  T3.Document_Object_ID JOIN Collections AS T4 ON T3.Collection_ID  =  T4.Collection_ID WHERE T2.Document_Subset_Name = "Best for 2000" AND T4.Collection_Name = "Best";