470
While she would go on lecture tours , Houghton and Charlotte would exchange letters and spend as much time as they could together before she left .
 person: Houghton; person: Charlotte
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: Houghton, Charlotte 
Answer:
 person: Houghton; person: Charlotte