Lack is related to Empty. Empty is a synonym of Clean. Sink is a type of Clean. 
Upper is part of Boot. Boot is related to Type. Type is related to Lap. Lap is related to Circuit. 
Lack <--RelatedTo--> Empty <--Synonym--> Clean <--IsA-- Sink 
Upper --PartOf--> Boot <--RelatedTo--> Type <--RelatedTo--> Lap <--RelatedTo--> Circuit 