Play is related to Button. Button is related to Space. Space can be used for Item. 
Correspondent is related to Person. Senator is a type of Person. Senator is a type of Legislator. Legislature is etymologically related to Legislator. 
Play <--RelatedTo--> Button <--RelatedTo--> Space --UsedFor--> Item 
Correspondent <--RelatedTo--> Person <--IsA-- Senator --IsA--> Legislator <--EtymologicallyRelatedTo-- Legislature 