Committee is related to Special. Specialist is derived from Special. 
Grass is related to Vegetable. Vegetable is related to Can. Can is the opposite of Jar. you are likely to find Pill in/at/on Jar. 
Committee <--RelatedTo--> Special <--DerivedFrom-- Specialist 
Grass <--RelatedTo--> Vegetable <--RelatedTo--> Can <--Antonym--> Jar <--AtLocation-- Pill 