Complex sentence: These were under the command of Uthman bin Abi-l-Ulá, a Berber noble fighting in the service of the sultans of Granada, who set off with six thousand cavalry and an unknown number of infantry to the relief of Teba.
Split into simpler sentences: These were under the command of Uthman bin Abi-l-Ulá, a Berber noble fighting in the service of the sultans of Granada. He set off with six thousand cavalry and an unknown number of infantry to the relief of Teba.