8191
Here , n - type enhancement - mode In ( 2 ) O ( 3 ) NW FETs are successfully fabricated by doping different metal elements ( Mg , Al , and Ga ) in the NW channels .
 Chemical: In ( 2 ) O ( 3 ); Chemical: Mg; Chemical: Al; Chemical: Ga
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: In ( 2 ) O ( 3 ), Mg, Al, Ga 
Answer:
 Chemical: In ( 2 ) O ( 3 ); Chemical: Mg; Chemical: Al; Chemical: Ga