Complex sentence: The next day, James, Mollie, Stuart, Rona, and Mollie's parents attend a barbecue, where Julie asks Mikey why he saved her when they're always fighting.
Split into simpler sentences: The next day, James, Mollie, Stuart, Rona, and Mollie's parents attend a barbecue. There, Julie asks Mikey why he saved her when they're always fighting.