Pull is a synonym of Obtain. Obtain is a synonym of Achieve. Achieve is a synonym of Acquire. Acquire is related to Gain. 
Professor is related to Teach. Guitar can be used for Teach. Pickup is part of Guitar. 
Pull <--Synonym--> Obtain <--Synonym--> Achieve <--Synonym--> Acquire <--RelatedTo--> Gain 
Professor <--RelatedTo--> Teach <--UsedFor-- Guitar <--PartOf-- Pickup 