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al gore , today hopscotching across the midwest , reminding voters of his environmentalist credentials .
 al gore, voters, his, environmentalist, the midwest
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 al gore, voters, his, environmentalist, the midwest