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The aridity of the region necessitates either dryland farming methods or irrigation ; much water for irrigation is drawn from the underlying Ogallala Aquifer , which makes it possible to grow water-intensive crops such as corn , which the region 's aridity would otherwise not support .
 location: Ogallala Aquifer
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: Ogallala Aquifer 
Answer:
 location: Ogallala Aquifer