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He was promoted to Basel 's senior squad during the 2008/09 Winter break and made his debut in a 0 – 0 draw with Grasshopper-Club Zürich at St. Jakob-Park on 15 February 2009 .
 Basel, Grasshopper-Club Zürich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Basel, Grasshopper-Club Zürich