17897
BACKGROUND : Theobromine , a methylxanthine related to caffeine and present in high levels in cocoa , may contribute to the appeal of chocolate .
 Chemical: Theobromine; Chemical: methylxanthine; Chemical: caffeine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Theobromine, methylxanthine, caffeine 
Answer:
 Chemical: Theobromine; Chemical: methylxanthine; Chemical: caffeine