8643
Solutions of Nafion (R) with an ion exchange capacity ( IEC ) of 0 . 91 meq g ( - 1 ) , which are on the verge of the formation of SO ( 3 ) H nanoclusters , were spin coated on silicon ( Si ) , glassy carbon ( GC ) and platinum / silicon ( Pt / Si ) substrates to form films of up to 256 nm thickness .
 Chemical: Nafion; Chemical: SO ( 3 ) H; Chemical: silicon; Chemical: Si; Chemical: glassy carbon; Chemical: platinum; Chemical: silicon; Chemical: Pt; Chemical: Si
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: Nafion, SO ( 3 ) H, silicon, Si, glassy carbon, platinum, silicon, Pt, Si 
Answer:
 Chemical: Nafion; Chemical: SO ( 3 ) H; Chemical: silicon; Chemical: Si; Chemical: glassy carbon; Chemical: platinum; Chemical: silicon; Chemical: Pt; Chemical: Si