13777
This is accompanied by hydrolysis of the gamma - Al ( 2 ) O ( 3 ) to form Al ( OH ) ( 3 ) and / or AlO ( OH ) .
 Al ( 2 ) O ( 3 ), Al ( OH ) ( 3 ), AlO ( OH )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Al ( 2 ) O ( 3 ), Al ( OH ) ( 3 ), AlO ( OH )