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The printing process at first proved nearly impossible because the several layers of ink immediately ran , blurring outlines and rendering place names illegible until the inventor of the maps , Clayton Hutton , mixed a little pectin with the ink and at once the pectin coagulated the ink and prevented it from running , allowing small topographic features to be clearly visible .
 person: Clayton Hutton
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: Clayton Hutton 
Answer:
 person: Clayton Hutton