2400
Kids in Houston don ' t know whether they can go out to play every day until the school officials or the local officials check the air quality . ' '
 Houston, school, Kids in Houston, they, the school officials, the local officials
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Houston, school, Kids in Houston, they, the school officials, the local officials