114267
Alternative hypotheses trace it back either to the verb " teret " ( тереть , " to rub " or " to grate " ) or to the term " tvorog " ( творог , " quark " ) .
 quark
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:
 quark