Complex sentence: Abu al-Qasim Muhammad ibn Abbad or Abbad I, (died in 1042), was the founder and eponym of the Abbadid dynasty; first independent Muslim ruler of Seville in Spain (resigned 1023-1042).
Split into simpler sentences: Abu al-Qasim Muhammad ibn Abbad, or Abbad I, was born in the 10th century and died in 1042. He was the first independent Muslim ruler of Seville (his reign dating 1023-1042).