Ability is related to Afford. Afford is related to Purchase. Purchase is related to Price. Price is related to Good. 
Yield is a synonym of Give. Give is a synonym of Gift. Gift is a type of Software. 
Ability <--RelatedTo--> Afford <--RelatedTo--> Purchase <--RelatedTo--> Price <--RelatedTo--> Good 
Yield <--Synonym--> Give <--Synonym--> Gift --IsA--> Software 