14513
This is observed for , both , extra - helical cytosines and intra - helical cytosines in which the cytosine on the complementary strand flips out and water molecules enter the DNA double - helix and substitute the hydrogen bonds with the orphan guanine .
 Chemical: cytosines; Chemical: cytosines; Chemical: cytosine; Chemical: hydrogen; Chemical: guanine
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: cytosines, cytosines, cytosine, hydrogen, guanine 
Answer:
 Chemical: cytosines; Chemical: cytosines; Chemical: cytosine; Chemical: hydrogen; Chemical: guanine