Shoe can Trip. Shoe is related to Outer. 
Bitter is related to Dark. Dark is related to Shade. Shade is related to Head. Head is the opposite of Toe. 
Trip <--CapableOf-- Shoe <--RelatedTo--> Outer 
Bitter <--RelatedTo--> Dark <--RelatedTo--> Shade <--RelatedTo--> Head <--Antonym--> Toe 