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For performance testing , 40 plasma samples were spiked with sarin , soman , tabun , or VX and 10 normal plasma samples were used as the negative control .
 Chemical: sarin; Chemical: soman; Chemical: tabun
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: sarin; Chemical: soman; Chemical: tabun