69221
An alternative way of producing potassium nitrate without a by-product of ammonia is to combine ammonium nitrate , found in instant ice packs , and potassium chloride , easily obtained as a sodium-free salt substitute .
 food: salt substitute
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: salt substitute 
Answer:
 food: salt substitute