1933
Their twining habit makes them very suitable for use as intercrops with such species as maize , sorghum and possibly some of the minor millet species , which can provide support , but also makes them difficult to harvest .
 plant: maize; plant: sorghum; plant: millet
Please list all entity words in the text that fit the category.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} 
Answer:
 plant: maize; plant: sorghum; plant: millet