Simplify the following text for a Grade 9 native English-speaking person.
Original: The surviving verses , representing what is thought to be just a small part of the original work , do not explain why the fight broke out , nor do they give the outcome of the battle .
Simplified: The verses of the story that were found ( which is thought to be a small part of the original work ) do not explain why the fight started , nor do they give the outcome of the battle .