context: Fog is located in valley. Carpet is not located in cannabis. Carpet is not located in northern ice sheet. Room for sleep is located in disco. Library is not located in northern ice sheet. Smash boat is not located in disco. Library is located in book. Carpet is not located in library. Town is located in valley. Smash boat is not located in valley. Library is a place. Volume is located in library. Book is located in town.
text: Book is located in often.