Crop is a synonym of Reduce. Reduce is related to Ecological. 
Bill is related to Total. Total is related to Complete. Complete is a synonym of Turn. Version is a type of Turn. 
Crop <--Synonym--> Reduce <--RelatedTo--> Ecological 
Bill <--RelatedTo--> Total <--RelatedTo--> Complete <--Synonym--> Turn <--IsA-- Version 