19201
Emtricitabine / tenofovir disoproxil fumarate : a review of its use in HIV - 1 pre - exposure prophylaxis .
 Chemical: Emtricitabine; Chemical: tenofovir disoproxil fumarate
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: Emtricitabine, tenofovir disoproxil fumarate 
Answer:
 Chemical: Emtricitabine; Chemical: tenofovir disoproxil fumarate