6525
We evaluated the effects of chronic low - dose arsenic relevant to U . S . drinking water standards ( i . e . , 10 ppb [ 130nM ] ) on airway epithelial cells .
 Chemical: arsenic
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