Conclude is a synonym of Do. Do is related to Wash. Wash is a type of Remove. Lift is a type of Remove. 
Combine is a type of Contribute. Combine is a synonym of Mix. Mix is related to Salad. Salad is derived from Potato. 
Conclude <--Synonym--> Do <--RelatedTo--> Wash --IsA--> Remove <--IsA-- Lift 
Contribute <--IsA-- Combine <--Synonym--> Mix <--RelatedTo--> Salad --DerivedFrom--> Potato 