Evaluation is related to Price. Price is related to Right. Right is a different concept from Left. 
Separate is a synonym of Classify. Classify entails/necessarily involves Compare. Compare is related to Contrast. 
Evaluation <--RelatedTo--> Price <--RelatedTo--> Right <--DistinctFrom--> Left 
Separate <--Synonym--> Classify --Entails--> Compare <--RelatedTo--> Contrast 