104381
Microwavable heating pads are typically made out of a thick insulative fabric such as flannel and filled with grains such as wheat , buckwheat or flax seed .
 wheat, buckwheat
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:
 wheat, buckwheat