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
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: silicon; Chemical: SiN ( x ); Chemical: SiO ( 2 ); Chemical: SiO ( 2 ); Chemical: Si