Find papers whose second author has last name "Turon" and is affiliated with an institution in the country "USA".
return papers ;return second authors of  #1 ;return last names of  #2 ;return #1 where #3 is  Turon ;return institutions #2 are  affiliated with ;return countries of  #5 ;return #1 where #6 is  USA ;return #1 of  both #4 and  #7
['select', 'project', 'project', 'comparative', 'project', 'project', 'comparative', 'intersection']