The Head-Driven Phrase Structure Grammar (HPSG) is a grammar theory developed by Pollard and Sag (1985). It uses a uniform formalism and is organized in a modular way which makes it attractive for Natural language processing.
... Indian Reservation[?]
Yakima Indian Reservation[?]
Flathead Indian Reservation[?]
Blackfeet Indian Reservation[?]
Rocky Boy's Indian Reservation[?]
Fort Belknap ...