Who served as Prime Minister for a less amount of time,  Elbegdorj or Rinchinnyamyn Amarjargal?
return Elbegdorj ;return Rinchinnyamyn Amarjargal ;return amount of time served as Prime Minister of  #1 ;return amount of time served as Prime Minister of  #2 ;return which is the  lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']