With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Abu Talib ibn Abd al-Muttalib was the leader of a clan with a unique maternal bloodline of Arabian ancestry.
text_B: The Quraysh were a tribe that historically inhabited and controlled Mecca and its Ka'aba .. Mecca. Mecca. Ka'aba. Ka'aba. The Islamic prophet Muhammad was born into the Banu Hashim clan of the Quraysh tribe .. Muhammad. Muhammad. Banu Hashim. Banu Hashim. The Quraysh staunchly opposed Muhammad until converting to Islam en masse in 630 CE .. Islam. Islam. Muhammad. Muhammad. Afterward , leadership of the Muslim community traditionally passed to a member of the Quraysh as was the case with the Rashidun , Umayyad , and Abbasid caliphs .. Rashidun. Rashidun Caliphate. Umayyad. Umayyad Caliphate. Abbasid. Abbasid Caliphate
related.