Complex sentence: Molly spent a year in England after the war ended, getting to know her girls again, a time her children and their Crowfoot cousins would later describe as one of the best periods in their life.
Split into simpler sentences: Molly spent a year in England after the war ended, getting to know her girls again. The time she spent with her children and their Crowfoot cousins they would later describe as one of the best periods in their life.