25225
Viability data demonstrated that macrophages were most sensitive to silica NP and interestingly , murine cell lines were generally found to be more sensitive than comparable human cell lines .
 Chemical: silica
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: silica