1053
METHODS : Adult male Swiss Webster mice ( 25 - 32 g ) were given nicotine ( 0 . 05 - 0 . 25 mg / kg s . c . ) or saline 10 min before caffeine ( 70 mg / kg i . p . ) or pentylenetetrazole ( 15 and 30 mg / kg i . p . ) injections .
 Chemical: nicotine; Chemical: caffeine; Chemical: pentylenetetrazole
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: nicotine; Chemical: caffeine; Chemical: pentylenetetrazole