1923
Of these , nearly half ( n = 78 ) had used BZDs / RDs before admission , and the remainder ( n = 86 ) were non - users .
 Chemical: BZDs
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: BZDs 
Answer:
 Chemical: BZDs