19253
At his first school in the U.S. he was thought a little strange for shutting off open water taps and admonishing his schoolmates to take only brief showers .
 first, U.S.
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 first, U.S.