With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: For 715 years , from 1278 to 1993 , Andorrans lived under a unique co-principality , ruled by French and Spanish leaders ( from 1607 onward , the French chief of state and the Spanish bishop of Seu d'Urgell ) .
text_B: 1278 is a calendar year
entailed.