19598
This technique provides a better understanding of the relationships between causal factors and pharmaceutical responses in theophylline tablet formulations .
 Chemical: theophylline
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: theophylline 
Answer:
 Chemical: theophylline