3553
Increasing prenatal PCB - 153 concentrations were associated with worse mental and psychomotor scores , although significance was only reached for psychomotor development ( beta [ 95 % CI ] = - 1 . 36 [ - 2 . 61 , - 0 . 11 ] ) .
 Chemical: PCB - 153
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: PCB - 153