200999
In 1968 he became principal investigator at the National Agronomic Station , where he worked from 1937 to 1982 , year of his retirement .
 None
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:  
Answer:
 None