Part is a synonym of Distribute. Distribute is a type of Exist. Exist is related to Idea. 
Chance is related to Mark. Mark is related to Grade. Grade is a type of Cattle. you are likely to find Cow in/at/on Cattle. 
Part <--Synonym--> Distribute --IsA--> Exist <--RelatedTo--> Idea 
Chance <--RelatedTo--> Mark <--RelatedTo--> Grade --IsA--> Cattle <--AtLocation-- Cow 