8312
This is in sharp contrast to many III - V nanowires on silicon which are observed to stem from thin SiN ( x ) , SiO ( 2 ) , or SiO ( 2 ) / Si openings .
 Chemical: silicon; Chemical: SiN ( x ); Chemical: SiO ( 2 ); Chemical: SiO ( 2 ); 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: silicon, SiN ( x ), SiO ( 2 ), SiO ( 2 ), Si 
Answer:
 Chemical: silicon; Chemical: SiN ( x ); Chemical: SiO ( 2 ); Chemical: SiO ( 2 ); Chemical: Si