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The book deals with events before a nuclear attack on London during a ( presumably ) limited nuclear war , which results in the imposition of a later post-apocalyptic pan-European dystopian dictatorship , until rescue arrives for the prisoners at the zoo , transformed into a concentration camp .
 location: London
Please list all entity words in the text that fit the category.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} 
Answer:
 location: London