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Watching a stock drop after hours , open lower , and close even lower than that makes me wonder just who ' s selling : a runup usually builds on a gradual crescendo of greater - fool theory -- everyone thinks they can always sell to someone dumber -- and ends when the greatest fool yet gets sick of the whole thing and bails .
 everyone: seller; someone: buyer
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: transfer ownership 
  Option: artifact, seller, place, beneficiary, buyer 
Text: {0} 
Answer:
 everyone: seller; someone: buyer