White is similar to Light. Light is the opposite of Important. Important is related to Crucial. Crucial is similar to Material. 
Agent is related to Detective. Detective is related to Clue. 
White <--SimilarTo--> Light <--Antonym--> Important <--RelatedTo--> Crucial <--SimilarTo--> Material 
Agent <--RelatedTo--> Detective <--RelatedTo--> Clue 