1356
A variety of abnormal sensory / motor behaviors associated with electrical discharges recorded from the bilateral brainstem were induced in adult WKY rats by mechanical ( electrode implants ) and DC electrical current stimulations and by acute and chronic administration of cocaine .
 Chemical: cocaine
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: cocaine