Complex sentence: Urien's son Owain fought alongside his father at the first of these and slew the enemy leader Fflamddwyn; some scholars have argued that Fflamddwyn is none other than Ida of Bernicia and that the battle occurred around the year 547.
Split into simpler sentences: Urien's son Owain fought alongside his father at the first of these and slew the enemy leader Fflamddwyn. Some scholars have argued that Fflamddwyn is none other than Ida of Bernicia and that the battle occurred around the year 547.