With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: ANC infighting , which has grown in recent years , came to a head in September 2008 when President Thabo MBEKI resigned , and Kgalema MOTLANTHE , the party 's General-Secretary , succeeded him as interim president .
text_B: President is a time on the clock
not-entailed.