Complex sentence: One account of this practice claims that during the 1972 Winter Olympics in Sapporo, Hokkaidō, American figure skater Janet Lynn stumbled into Japanese pop culture when she fell during a free-skate period, but continued to smile even as she sat on the ice.
Split into simpler sentences: One account of this practice claims it was influenced by the American figure skater Janet Lynn during the 1972 Winter Olympics in Sapporo, Hokkaidō. She fell during a free-skate period, but continued to smile even as she sat on the ice.