Question: Which city, Daqing or Pengzhou, is a prefecture-level city in the west of Heilongjiang province, People's Republic of China?
Sentence (from "Pengzhou"): Pengzhou (), formerly Peng County or Pengxian, is a county-level city under the jurisdiction of Chengdu, the capital of Sichuan province, People's Republic of China, some 19 km (11.81 mi) northwest of Chengdu.
Relevant evidence: Yes