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In 1964 Lavalle Urbina and Alicia Arellano , both from the Institutional Revolutionary Party ( PRI ) , were elected the first women in the Senate of Mexico .
 Lavalle Urbina, Institutional Revolutionary Party
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lavalle Urbina, Institutional Revolutionary Party