Task: Translation
Input (English): The exact cause is unknown - suggestions from eyewitnesses include the boat suddenly turning left, being hit by a wave, and many of the passengers moving to one side of the boat together.
Output (Indonesian): Penyebab utamanya tidak diketahui - keterangan dari saksi mata termasuk kapal tiba-tiba berbelok ke arah kiri, diterjang ombak dan banyak penumpang yang bergerak ke satu sisi secara bersamaan.