2755
It is speculated that the induction of muscular rigidity by fentanyl may involve the coerulospinal noradrenergic fibers to the spinal motoneurons .
 Disease: muscular rigidity; Chemical: fentanyl
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: muscular rigidity, fentanyl 
Answer:
 Disease: muscular rigidity; Chemical: fentanyl