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Shalom told a joint press conference that the tiny Gulf state ' s strong relationship with the recently appointed Palestinian prime minister , Mahmud Abbas , could be a boost for peace .
 minister: person; Palestinian: entity
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: start position 
  Option: person, entity, place 
Text: {0} 
Answer:
 minister: person; Palestinian: entity