Silent is a synonym of Quiet. Quiet is a synonym of Order. Order is related to Placement. 
Pump is related to Air. Living requires Air. Living is related to Eat. 
Silent <--Synonym--> Quiet <--Synonym--> Order <--RelatedTo--> Placement 
Pump <--RelatedTo--> Air <--HasPrerequisite-- Living <--RelatedTo--> Eat 