7553
We describe in the current paper an experimental and computational study of three methylated uracils , in particular , the 5 , 6 - dimethyl - , 1 , 3 , 5 - trimethyl - , and 1 , 3 , 5 , 6 - tetramethyl derivatives .
 Chemical: 5 , 6 - dimethyl - , 1 , 3 , 5 - trimethyl - , and 1 , 3 , 5 , 6 - tetramethyl
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: 5 , 6 - dimethyl - , 1 , 3 , 5 - trimethyl - , and 1 , 3 , 5 , 6 - tetramethyl 
Answer:
 Chemical: 5 , 6 - dimethyl - , 1 , 3 , 5 - trimethyl - , and 1 , 3 , 5 , 6 - tetramethyl