Complex sentence: In May 1962, the Tenth Panchen Lama sent Chinese Premier Zhou Enlai a report detailing the suffering of the Tibetan people, which became known as the 70,000 Character Petition.
Split into simpler sentences: In May 1962, the Tenth Panchen Lama sent Chinese Premier Zhou Enlai a report detailing the suffering of the Tibetan people. This became known as the 70,000 Character Petition.