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There are research programs attempting to develop perennial substitutes for existing annual crops , such as replacing wheat with the wild grass " Thinopyrum intermedium " , or possible experimental hybrids of it and wheat .
 Thinopyrum intermedium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Thinopyrum intermedium