13331
For MLG , we find that band gap opening as measured during transport is linearly increased with respect to the I ( D ) / I ( G ) ratio but remains below 0 . 1 meV in magnitude for SiO ( 2 ) supported graphene .
 Chemical: SiO ( 2 ); Chemical: graphene
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: SiO ( 2 ); Chemical: graphene