9737
Crystalline GaAs ( c - GaAs ) has been prepared directly through electroreduction of As ( 2 ) O ( 3 ) dissolved in an alkaline aqueous solution at a liquid gallium ( Ga ( l ) ) electrode at modest temperatures ( T >= 80 degrees C ) .
 Chemical: GaAs; Chemical: GaAs; Chemical: As ( 2 ) O ( 3 ); Chemical: gallium; Chemical: Ga ( l )
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: GaAs, GaAs, As ( 2 ) O ( 3 ), gallium, Ga ( l ) 
Answer:
 Chemical: GaAs; Chemical: GaAs; Chemical: As ( 2 ) O ( 3 ); Chemical: gallium; Chemical: Ga ( l )