Sir is related to Chair. Chair is related to Sit. Sit is a synonym of Accept. Accept is related to Take. 
Mental is related to Thought. Thought is a type of Belief. Philosophy is a type of Belief. 
Sir <--RelatedTo--> Chair <--RelatedTo--> Sit <--Synonym--> Accept <--RelatedTo--> Take 
Mental <--RelatedTo--> Thought --IsA--> Belief <--IsA-- Philosophy 