12315
We developed technique for synthesizing platinum nanoparticles using folic acid as stabilizing agent which produced particles of relatively narrow size distribution , having d = 2 . 3 +/- 0 . 5 nm .
 Chemical: platinum; Chemical: folic acid
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: platinum, folic acid 
Answer:
 Chemical: platinum; Chemical: folic acid