Task: Question Answering
Input (English): Passage: 51st state -- Voters in Washington, D.C. and Puerto Rico have both voted for statehood in referendums. As statehood candidates, their admission to the Union requires congressional approval. American Samoa, Guam, the Northern Mariana Islands, and the United States Virgin Islands are also U.S. territories and could potentially become U.S. states someday.
Question: is puerto rico the 51st state of the united states
Output (English): 0