100767
They may join unions such as National Railway Workers ' Union , but their abilities to call a strike is severely limited by government legislation ; there is very little tolerance for railway work stoppage .
 organization: National Railway Workers ' Union
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: National Railway Workers ' Union 
Answer:
 organization: National Railway Workers ' Union