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-DOCSTART- RT @RedTRaccoon : Just so you have an idea how large Houston is- You could fit Chicago , Baltimore , Detroit , & amp ; Philidelphia within it and still not cover it . https://t.co/oPixWtssB9
 Chicago, Baltimore, Detroit, Philidelphia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: exact location, area, road, river 
Text: {0} 
Answer:
 Chicago, Baltimore, Detroit, Philidelphia