original: It is not known how much, if any, of this story is true, but historians do know that China was the first civilization to use silk.
simplifications: Historians know that China was the first civilization to use silk. People who study history do not know if this story is true or not, but China was the first group of people to use silk. It's not clear if this story is true, but historians know that China was the first to use silk. China being the first country to use silk is a rumor by historians. No one knows if any of the story is true. Historians know China was the first civilization to use silk. No one knows how much of this story is true. However, historians do know that China was the first civilization to use silk. It is not known if the story is true. However, historians know China was the first to use silk. Historians do no know if this story is true. However, historians do know that China was the first civilization to use silk. No telling if the story is true, but history says that China was the first people to use silk. It is not known how much, if any, of this story is true, but historians do know that China was the first society to use silk.