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Receptor mutant subclones of CEM-C7 , which are proven to be completely unresponsive to micromolar concentrations of dexamethasone when grown in serum-supplemented medium , become partially sensitive to the hormone after growth in defined medium.
 cell line: CEM-C7
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: CEM-C7