9244
These tungsten carbides are successful cocatalysts for overall water splitting and give H ( 2 ) and O ( 2 ) in a stoichiometric ratio from H ( 2 ) O decomposition when supported on a Na - doped SrTiO ( 3 ) photocatalyst .
 Chemical: tungsten carbides; Chemical: H ( 2 ); Chemical: O ( 2 ); Chemical: H ( 2 ) O; Chemical: Na; Chemical: SrTiO ( 3 )
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: tungsten carbides, H ( 2 ), O ( 2 ), H ( 2 ) O, Na, SrTiO ( 3 ) 
Answer:
 Chemical: tungsten carbides; Chemical: H ( 2 ); Chemical: O ( 2 ); Chemical: H ( 2 ) O; Chemical: Na; Chemical: SrTiO ( 3 )