5747
Delayed initiation of delivery , dystocia , and deaths or moribundities of pregnant females were observed at 180 mg / kg / day , and only two pregnant rats delivered live pups at that dose .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None