Complex sentence: Studies by the Human Rights Watch and Human Rights in China have both placed the number of detainees in a given year at about 200,000 in the late nineties, and 2007, the China Labor Bulletin estimated that there were over 300,000 detainees at re-education centers.
Split into simpler sentences: Studies by the Human Rights Watch and Human Rights in China have both placed the number of detainees in a given year at about 200,000 in the late nineties. In 2007, the China Labor Bulletin estimated that there were over 300,000 detainees at re-education centers.