Effect is related to Phenomenon. Phenomenon is related to Appear. 
Pump is related to Gasoline. Gasoline is related to Lead. Lead is a synonym of Conduct. Conduct is a synonym of Accompany. 
Effect <--RelatedTo--> Phenomenon <--RelatedTo--> Appear 
Pump <--RelatedTo--> Gasoline <--RelatedTo--> Lead <--Synonym--> Conduct <--Synonym--> Accompany 