106667
Evidence of drainage ditches at Kuk Swamp on the borders of the Western and Southern Highlands of Papua New Guinea shows evidence of the cultivation of taro and a variety of other crops , dating back to 11,000 BP. Two potentially significant economic species , taro ( " Colocasia esculenta " ) and yam ( " Dioscorea " sp. ) , have been identified dating at least to 10,200 calibrated years before present ( cal BP ) .
 Kuk Swamp, Western, Southern Highlands, Papua New Guinea, taro, Colocasia esculenta, yam, Dioscorea
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:
 Kuk Swamp, Western, Southern Highlands, Papua New Guinea, taro, Colocasia esculenta, yam, Dioscorea