Frame is part of Bed. Bed is related to Cover. you are likely to find Cover in/at/on Room. Room is related to Couch. 
Happen is related to Captain. Captain is related to Top. 
Frame --PartOf--> Bed <--RelatedTo--> Cover --AtLocation--> Room <--RelatedTo--> Couch 
Happen <--RelatedTo--> Captain <--RelatedTo--> Top 