3405
UNASSIGNED : Metolachlor , a widely used herbicide , is classified as a Group C carcinogen by the U . S .
 Chemical: Metolachlor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Metolachlor