10874
Water and food are the main sources of fluoride exposure and therefore it is necessary to study intestinal absorption in order to make a correct evaluation of the risk / benefit associated with exposure to fluoride .
 Chemical: fluoride; Chemical: fluoride
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: fluoride; Chemical: fluoride