3441
Then , during a 21 - d post exposure recovery period , effects of the TiO ( 2 ) exposure on reproductive success were evaluated .
 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 )