3439
Silver ( Ag ) NPs are highly relevant for human exposure due to their use in food contact materials , dietary supplements , and antibacterial wound treatments .
 Chemical: Silver; Chemical: Ag
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: Silver; Chemical: Ag