11228
Catalepsy intensity : caffeine ED50 = 24 . 1 mu mol / kg [ 95 % CI , 18 . 4 - 31 . 5 ] ; theophylline ED50 = 22 . 0 mu mol / kg [ 95 % CI , 17 . 0 - 28 . 4 ] .
 Chemical: caffeine; Chemical: theophylline
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: caffeine; Chemical: theophylline