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Lapatinib , a dual epidermal growth factor receptor ( EGFR ) / human epidermal growth factor receptor 2 ( HER2 ) kinase inhibitor , showed clinical benefits in advanced HER2 - positive breast cancer patients .
 Chemical: Lapatinib
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Lapatinib