2568
Ten microlitres aliquots of peripheral venous human blood were incubated with tarragon extract , saline , or the mutagen sodium dichromate .
 Chemical: sodium dichromate
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: sodium dichromate