5702
The aim of the present study was to prepare and evaluate patches for the controlled release of lidocaine in the oral cavity .
 Chemical: lidocaine
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: lidocaine 
Answer:
 Chemical: lidocaine