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The FARC sought the exchange of more than 70 politicians , soldiers and policemen in its control for nearly 500 rebels imprisoned by the government , said Luis Devia , also known as Raul Reyes , a FARC leader , in a letter sent to the program Noticias Uno .
 ( phone write: letter,  Luis Devia: entity) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( phone write: letter,  Luis Devia: entity) 