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On his debut on 12 August , in the opening match of the season against West Ham United , he came on as a late substitute in a 4 – 0 win .
 West Ham United
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 West Ham United