4419
Chromatographic analysis revealed that ethion was degraded into ethion monooxon , ethion dioxon , O , O - diethyl phosphorothioate , O - ethyl phosphorothioate and one unknown compound .
 Chemical: ethion; Chemical: ethion monooxon; Chemical: ethion dioxon; Chemical: O , O - diethyl phosphorothioate; Chemical: O - ethyl phosphorothioate
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: ethion; Chemical: ethion monooxon; Chemical: ethion dioxon; Chemical: O , O - diethyl phosphorothioate; Chemical: O - ethyl phosphorothioate