2634
EEG recordings were obtained before and 15 minutes following penicillin - G injection , and at 10th minutes following each stimulus for analysis in terms of frequency , amplitude , and power spectrum .
 Chemical: penicillin - G
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: penicillin - G