83126
The underlying technology is related to Ziegler–Natta catalysis , which involves the intermediacy of vanadium alkyls .
 location: Ziegler–Natta
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: Ziegler–Natta 
Answer:
 location: Ziegler–Natta