2785
The mean pain score for buffered lidocaine was significantly lower than the mean score for standard lidocaine ( 2 . 7 + / - 1 . 9 vs . 3 . 8 + / - 2 . 2 , P = 0 . 03 ) .
 Disease: pain; Chemical: lidocaine; Chemical: lidocaine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: pain, lidocaine, lidocaine 
Answer:
 Disease: pain; Chemical: lidocaine; Chemical: lidocaine