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An expert on water treatment and corrosion , Edwards 's research on elevated lead levels in Washington , DC 's municipal water supply gained national attention , changed the city 's recommendations on water use in homes with lead service pipes , and caused the Centers for Disease Control and Prevention to admit to publishing a report so rife with errors that a congressional investigation called it " scientifically indefensible " .
 person: Edwards; location: Washington , DC; organization: Centers for Disease Control and Prevention
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Edwards, Washington , DC, Centers for Disease Control and Prevention 
Answer:
 person: Edwards; location: Washington , DC; organization: Centers for Disease Control and Prevention