63446
They have been grown as food for domesticated animals for up to 6,000 years and the grains of grasses such as wheat , rice , maize ( corn ) and barley have been the most important human food crops .
 plant: wheat; plant: rice; plant: maize; plant: barley
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: wheat, rice, maize, barley 
Answer:
 plant: wheat; plant: rice; plant: maize; plant: barley