15760
Carcinogenicity of ethyl tertiary - butyl ether ( ETBE ) was examined with inhalation exposure using F344 / DuCrlCrlj rats .
 Chemical: ethyl tertiary - butyl ether; Chemical: ETBE
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: ethyl tertiary - butyl ether, ETBE 
Answer:
 Chemical: ethyl tertiary - butyl ether; Chemical: ETBE