Task: Text Categorization
Input (English): One city in this state, named for a tree that Edward Beale destroyed, was the site of the personal observatory where Percival Lowell discovered Pluto. Mountains surrounding the capital in this state include the White Tank Mountains and the Superstition Mountains. This state's city of Window Rock is the seat of government for the Navajo Nation. It contains the Painted Desert, Petrified Forest, and Saguaro National Park. Its cities include Winslow, Flagstaff, Yuma, and Tucson. For 10 points, name this southwest state, home to the Grand Canyon and Phoenix.
Output (English): Social Science