1063
Perez de Cuellar said in December , when he accepted the 1988 Nobel Peace Prize on behalf of U.N. peacekeepers , that the failure of members to pay dues threatens the work of the United Nations .
 Perez de Cuellar, U.N.; Perez de Cuellar, United Nations
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: Organization based in, Located in, Live in, Work for, Kill 
Text: {0} 
Answer:
 Perez de Cuellar, U.N.; Perez de Cuellar, United Nations