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Heritage science can be considered an anthropogenic analog to environmental geography , which was defined by Halford Mackinder in 1887 as a discipline that aims to " bridge one of the greatest of all gaps " between " the natural sciences and the study of humanity " .
 person: Halford Mackinder
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: Halford Mackinder 
Answer:
 person: Halford Mackinder