11534
Roberts had a horse shot out from under him at the Second Battle of Bull Run , when he commanded the 1st Brigade while General John H. Martindale suffered from typhoid fever .
 Roberts, John H. Martindale
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Roberts, John H. Martindale