14451
The contrast effect was noted by the 17th Century philosopher John Locke , who observed that lukewarm water can feel hot or cold depending on whether the hand touching it was previously in hot or cold water .
 person: John Locke
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: John Locke 
Answer:
 person: John Locke