73600
In 1904 , the Blues are credited with signing the first black players in American professional football , halfback Charles Follis .
 person: Charles Follis
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Charles Follis 
Answer:
 person: Charles Follis