13255
The results demonstrated that compared with controls , VPA chicks were significantly slow in aggregation ( 12 . 7 +/- 2 . 5 s vs . 2 . 9 +/- 0 . 9 s , p = 0 . 006 ) and belongingness ( 3 . 6 +/- 0 . 28 s / 40 cm vs . 2 . 6 +/- 0 . 14 s / 40 cm , P = 0 . 003 ) and weak in vocalization ( 13 . 4 +/- 2 . 8 dB / 30 s vs . 26 . 7 +/- 1 . 3 dB / 30 s , P = 0 . 001 ) , respectively .
 Chemical: VPA
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: VPA