3448
Overall , this study showed limited toxicity of bulk or nano scale TiO ( 2 ) during the exposure ; however reproduction was affected in both bulk and NP 1 . 0 mg l ( - 1 ) groups .
 Chemical: TiO ( 2 )
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: TiO ( 2 )