With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Pursuant to an agreement signed by China and Portugal on 13 April 1987 , Macau became the Macau Special Administrative Region ( SAR ) of the People 's Republic of China on 20 December 1999 .
text_B: 1987 is a calendar year
entailed.