2807
Latency to the loss of righting reflex , rigidity and behavior on recovery , reflected the relative predominance of ketamine or morphine in each combination .
 Disease: rigidity; Chemical: ketamine; Chemical: morphine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: rigidity; Chemical: ketamine; Chemical: morphine