With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Eastern Turkmenistan for centuries formed part of the Persian province of Khurasan ; in medieval times Merv ( today known as Mary ) was one of the great cities of the Islamic world and an important stop on the Silk Road .
text_B: Eastern Turkmenistan is a famous person
not-entailed.