21067
Using LC - NSI - HRMS / MS - PRM , O ( 6 ) - methyl - G , 7 - POB - G , and O ( 2 ) - POB - dT were positively identified in ALDH - positive cell DNA .
 Chemical: O ( 6 ) - methyl - G; Chemical: 7 - POB - G; Chemical: O ( 2 ) - POB - dT
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: O ( 6 ) - methyl - G; Chemical: 7 - POB - G; Chemical: O ( 2 ) - POB - dT