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When David Cone heard about the Mets filling out their pitching rotation Monday _ and ending their interest in signing him _ he was already considering a proposition to work as a late - inning reliever for the Kansas City Royals .
 the Mets, their, their, the Kansas City Royals, David Cone, him, he, a late - inning reliever for the Kansas City Royals
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 the Mets, their, their, the Kansas City Royals, David Cone, him, he, a late - inning reliever for the Kansas City Royals