6521
By then , Herbert Spencer had developed the concept theory that organisms strive to evolve due to an internal " driving force " ( orthogenesis ) in 1862 .
 person: Herbert Spencer
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: Herbert Spencer 
Answer:
 person: Herbert Spencer