Grass is related to Pitch. Pitch is related to Note. Minute is a type of Note. 
Block is related to Guard. Guard is the opposite of Inmate. Inmate is similar to Prisoner. 
Grass <--RelatedTo--> Pitch <--RelatedTo--> Note <--IsA-- Minute 
Block <--RelatedTo--> Guard <--Antonym--> Inmate <--SimilarTo--> Prisoner 