Hall is related to College. College is related to Course. Course is related to Plan. Planning is a form of Plan. 
Lemon is related to Grass. Grass is related to Cow. 
Hall <--RelatedTo--> College <--RelatedTo--> Course <--RelatedTo--> Plan <--FormOf-- Planning 
Lemon <--RelatedTo--> Grass <--RelatedTo--> Cow 