But blackouts have been a serious problem for years here in Guangzhou , the biggest city in the Pearl River Delta , and they are worse this spring as oil-fired plants have shut down , though coal-fired power plants have kept running .
Guangzhou /location/location/contains Pearl River Delta
CC NNS VBP VBN DT JJ NN IN NNS RB IN NNP , DT JJS NN IN DT NNP NNP NNP , CC PRP VBP RBR DT NN IN JJ NNS VBP VBN RP , IN JJ NN NNS VBP VBN VBG .
Guangzhou
LOCATION
Pearl River Delta
LOCATION
/location/location/contains