1248
Zanthoxylum usambarense ( Engl . ) Kokwaro ( Rutaceae ) Extracts Inhibit the Growth of the Breast Cancer Cell Lines MDA - MB - 231 and MCF - 7 , But Not the Brain Tumour Cell Line U251 In Vitro .
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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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