Original sentence: Tibet was once an independent kingdom, the government of the People's Republic of China and the Government of Tibet in Exile, however, disagree over when Tibet became a part of China, and whether this incorporation into China is legitimate
Edited sentence: The government of the People's Republic of China and the Government of Tibet in Exile, however, disagree over when Tibet became a part of China, and whether this incorporation into China is legitimate.Tibet was once an independent kingdom from 1912 to 1951, when it was absorbed into the People's Republic of China