Gravity is a type of Company. Habitat is a type of Company. Habitat is a type of Environment. 
Sum is a synonym of Summit. Summit is a type of Reach. Reach is related to Push. Push is a synonym of Crowd. 
Gravity --IsA--> Company <--IsA-- Habitat --IsA--> Environment 
Sum <--Synonym--> Summit --IsA--> Reach <--RelatedTo--> Push <--Synonym--> Crowd 