What are the investors who have invested in both entrepreneurs who requested more than 140000 and entrepreneurs who requested less than 120000?
return investors ;return entrepreneurs  ;return #2 who  requested  more than 140000 ;return #2 who  requested  less than 120000 ;return #1 who  invested in both #3 and  #4
['select', 'select', 'filter', 'filter', 'intersection']