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A gunman with something strapped to his chest&mdash ; believed to be an " explosive device " & mdash ; has taken at least one person hostage inside the headquarters in , Maryland .
 location: Maryland
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: Maryland 
Answer:
 location: Maryland