58277
The net reaction is : The process involves several stages , the first of which involves monohydrocyanation ( addition of one molecule of HCN ) , affording isomers of pentenenitriles as well as 2 - and 3-methylbutenenitrile s. These unsaturated nitriles are subsequently isomerized to the 3-and 4-pentenenitrile s. In the final stage , these pentenenitriles are subjected to a second hydrocyanation , in an anti-Markovnikov sense , to produce adiponitrile .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None