1891
Joan Feynman deduced in the 1970 s that the long-term averages of solar wind speed correlated with geomagnetic activity .
 person: Joan Feynman
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: Joan Feynman 
Answer:
 person: Joan Feynman