28546
alpha ERKO mice displayed modestly attenuated behavioral responses to novelty and cocaine compared to alpha WT littermates , but no behavioral differences were found between beta ERKO and beta WT mice .
 Chemical: cocaine
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: cocaine