6530
Tracheal epithelial cells from arsenic - exposed mice displayed reduced ATP - mediated Ca ( 2 + ) signaling dynamics similar to our in vitro chronic exposure .
 Chemical: arsenic; Chemical: ATP; Chemical: Ca ( 2 + )
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: arsenic; Chemical: ATP; Chemical: Ca ( 2 + )