10116
Specific surface area of titanium dioxide ( TiO2 ) particles influences cyto - and photo - toxicity .
 Chemical: titanium dioxide; Chemical: TiO2
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: titanium dioxide; Chemical: TiO2