Straight is a synonym of True. True is a synonym of Truth. Truth is related to Answer. 
Paper is related to Pad. you are likely to find Pad in/at/on Store. Store is related to Express. 
Straight <--Synonym--> True <--Synonym--> Truth <--RelatedTo--> Answer 
Paper <--RelatedTo--> Pad --AtLocation--> Store <--RelatedTo--> Express 