Complex sentence: Diane is determined to prove to her grandchildren that they aren't just the' other grandparents', but problems arise when the kids' 21st-century behaviors collide with Artie and Diane's old-school methods.
Split into simpler sentences: Diane is determined to prove to her grandchildren that they aren't just the' other grandparents'. Problems arise when the kids' 21st-century behaviors collide with Artie and Diane's old-school methods.