27709
The average ratio of apical - to - transcriptional BMD values was less than two suggesting that for the current chemicals , transcriptional perturbation did not occur at significantly lower doses than apical responses .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None