Complex sentence: He also issued a fatwa for Yusuf Ibn Tashfin, the Almoravid ruler of Al-Andulus (Muslim Spain) that allowed him to invade Spain and depose of the divided Taifa kingdoms.
Split into simpler sentences: He also issued a fatwa for Yusuf Ibn Tashfin, the Almoravid ruler of Al-Andulus (Muslim Spain). This allowed him to invade Spain and depose of the divided Taifa kingdoms.