With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: According to Algeria 's APS news agency , Mohamed Abdelaziz , secretary-general of the Polisario Front , wrote to the current chairman of the African Union , Nigerian President Olusegun Obasanjo , asking him to intercede with Morocco .
text_B: Olusegun Obasanjo is a person
entailed.