Complex sentence: Gerald and Phoebe are seen holding hands walking to school together implying that they're a couple and Arnold tries to hold Helga's hand but turns back to her old self but secretly liked it.
Split into simpler sentences: Gerald and Phoebe are seen holding hands walking to school together implying that they're a couple. It is also implied that Arnold and Helga are a couple when he tries to hold Helga's hand but turns back to her old self but secretly liked it.