19107
People diagnosed with type 2 diabetes in the preceding 6 months were recruited from primary care practices in three adjacent inner - city boroughs of South London , serving a population in which 20 % of residents are of black African or Caribbean ethnicity .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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