Question: bilakah puerto rico menjadi sebahagian daripada amerika syarikat
Answer: 1898-12-10; 1898 december, 10; 10-12-1898; 1898 12 10; 12/10/1898; 1898 Disember 10; 10 12 1898; 1898-12-10; 12-10-1898; 12 10 1898; 10 Disember 1898; 10/12/1898