points to unknown or unspecified locations: where..., which [noun]... / points to objects belonging to an uncertain group: which [collective noun]...

seedbed

bed, futon, berth, crib, or any other surface or bedding for sleeping

construction worker

Alternative form of 出所 (dedokoro) above

riverbed / same as 川床 (kawayuka)

building / office building

A transliteration of the English male given name Bill

clipping of ビルディング (birudingu, “(non-residential) building”).

a terminal (airport building)