13777
This is accompanied by hydrolysis of the gamma - Al ( 2 ) O ( 3 ) to form Al ( OH ) ( 3 ) and / or AlO ( OH ) .
 Chemical: Al ( 2 ) O ( 3 ); Chemical: Al ( OH ) ( 3 ); Chemical: AlO ( OH )
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: Al ( 2 ) O ( 3 ), Al ( OH ) ( 3 ), AlO ( OH ) 
Answer:
 Chemical: Al ( 2 ) O ( 3 ); Chemical: Al ( OH ) ( 3 ); Chemical: AlO ( OH )