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Doubts were cast on the accuracy of the measurements in 1812 , when Joseph Rodriguez pointed out that , if they were accurate , the length of a degree of longitude did not vary with latitude as it should if the earth were flattened at the poles .
 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