Complex sentence: Alhassan was sent to a Qur'anic school (madrasah) in Bebeji and as his share of his father's wealth (as so often happens), seemed to have vanished, he had to support himself.
Split into simpler sentences: Alhassan was sent to a Qur'anic school (madrasah) in Bebeji. His share of his father's wealth seemed to have vanished and he had to support himself.