9000
Preparation Most commonly 2-nitrochlorobenzene is treated with ammonia , and the resulting 2-aminonitrobenzene is then hydrogenated : In the laboratory , the reduction of the nitroaniline is effected with zinc powder in ethanol , followed by purification of the diamine as the hydrochloride .
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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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