you are likely to find Ball in/at/on Street. Ball is related to Round. Round is related to Ground. you are likely to find Pilot in/at/on Ground. 
Pregnancy is a synonym of Abortion. Abortion is a type of Operation. Operation is related to Funny. 
Street <--AtLocation-- Ball <--RelatedTo--> Round <--RelatedTo--> Ground <--AtLocation-- Pilot 
Pregnancy <--Synonym--> Abortion --IsA--> Operation <--RelatedTo--> Funny 