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Álvarez was a member of the Washington Senators during spring training in 1963 and was expected to be the team 's starting first baseman going into the regular season .
 Álvarez, Washington Senators
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Álvarez, Washington Senators