131174
Elementary students are assigned to one of six elementary schools : named in honor of Neil Armstrong , Herbert Hoover , Thomas Jefferson , Paul Norton , Mark Twain and Grant Wood .
 Neil Armstrong, Herbert Hoover, Thomas Jefferson, Paul Norton, Mark Twain, Grant Wood
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Neil Armstrong, Herbert Hoover, Thomas Jefferson, Paul Norton, Mark Twain, Grant Wood