20189
Following i . v . administration of SUN , the onset of action for this central effect was rapid ( maximal effects within 30 minutes ) , but was abolished by severing afferent inputs to the dorsal horn .
 Chemical: SUN
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: SUN