What are the two major ethnic groups in Bolivia?
return Bolivia ;return ethnic groups of #1 ;return size of #2 ;return #2 where #3 is highest ;return #2 besides  #4 ;return #5 where #3 is highest ;return #4 ,  #6 ;return
['select', 'project', 'project', 'superlative', 'discard', 'superlative', 'union', 'select']