2174
Intramuscular ( i . m . ) huBuChE afforded almost complete protection when administered prior to the onset of observable cholinergic signs of VX poisoning , but once signs of poisoning became evident the efficacy of i . m .
 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