Find the titles of papers whose first author is affiliated with an institution in the country "Japan" and has last name "Ohori"?
return papers ;return first authors of #1 ;return affiliated institutions of #2 ;return countries of #3 ;return #1 where #4 is Japan ;return last names of #2 ;return #1 where #6 is Ohori ;return #1 in  both #5 and  #7 ;return titles of #8
['select', 'project', 'project', 'project', 'comparative', 'project', 'comparative', 'intersection', 'project']