19173
We found that TiO2 NPs ( diameter < 25 nm and < 100 nm ) in anatase crystalline can covalently interact with liver DNA by either inserting itself in between DNA base pairs or binding to DNA nucleotide via P - O - Ti - O bond .
 Chemical: TiO2; Chemical: nucleotide; Chemical: O - Ti - O
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: TiO2, nucleotide, O - Ti - O 
Answer:
 Chemical: TiO2; Chemical: nucleotide; Chemical: O - Ti - O