Complex sentence: While the islanders and pirates fight, Nami goes and unlocks Medaka, but before Nami can unlock Luffy or Zolo, Medaka runs away with the keys, saying "I hate pirates".
Split into simpler sentences: While the islanders and pirates fight, Nami goes and unlocks Medaka. Before Nami can unlock Luffy or Zolo, Medaka runs away with the keys, saying "I hate pirates".