Key is a type of Pitch. Key is a type of Device. Pull is a type of Device. Pull is related to Current. 
Testify is a synonym of Witness. Witness is related to Lawyer. you are likely to find Court in/at/on Lawyer. 
Pitch <--IsA-- Key --IsA--> Device <--IsA-- Pull <--RelatedTo--> Current 
Testify <--Synonym--> Witness <--RelatedTo--> Lawyer <--AtLocation-- Court 