Sector is part of Block. Block is a synonym of Wall. Wall is related to Roof. 
Pay is related to Render. Render is a synonym of Supply. Heat is a type of Supply. Heat is related to Burn. 
Sector --PartOf--> Block <--Synonym--> Wall <--RelatedTo--> Roof 
Pay <--RelatedTo--> Render <--Synonym--> Supply <--IsA-- Heat <--RelatedTo--> Burn 