71333
Theorists such as Ralf Dahrendorf have noted the tendency toward an enlarged middle class in modern Western societies , particularly in relation to the necessity of an educated work force in technological economies .
 person: Ralf Dahrendorf
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: Ralf Dahrendorf 
Answer:
 person: Ralf Dahrendorf