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After 30 games with the Astros , he was sold to the expansion Expos on the eve of their maiden 1969 National League season .
 Astros, Expos, National League
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Astros, Expos, National League