Regional is related to District. District is related to Civic. Civic is a synonym of Civil. 
you are likely to find Desk in/at/on Study. Desk is related to Flat. Hallway can be Flat. 
Regional <--RelatedTo--> District <--RelatedTo--> Civic <--Synonym--> Civil 
Study <--AtLocation-- Desk <--RelatedTo--> Flat <--HasProperty-- Hallway 