80820
The commander of the regular forces , Sam Houston , called for 5,000 " men to enlist in the regular army but had difficulty convincing men to join .
 Sam Houston
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:
 Sam Houston