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Rebel fighters were reportedly increasing their strength in the Qaboun and Barzeh neighbourhoods to minimise the risk of chemical weapons being used on them , as they would likely inflict casualties on the Syrian Army fighting rebels at close quarters .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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