Complex sentence: The daughter of Guy de Montlhery and Elizabeth, dame de Crecy, she married Louis in 1104 and together they would have one daughter, Isabelle, born in 1105.
Split into simpler sentences: The daughter of Guy de Montlhery, and Elizabeth, dame de Crecy. She married Louis in 1104 and together they would have one daughter, Isabelle, born in 1105.