2285
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 .
 location contains: Guangzhou, Pearl River Delta
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 location contains: Guangzhou, Pearl River Delta