92491
The term " Darwinism " was used for the evolutionary ideas of others , including Spencer 's " survival of the fittest " as free-market progress , and Ernst Haeckel 's polygenistic ideas of human development .
 person: Spencer; person: Ernst Haeckel
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: Spencer, Ernst Haeckel 
Answer:
 person: Spencer; person: Ernst Haeckel