A man is operating a piece of machinery.
A person is operating a noisy, blue machine.
Not all machinery is noisy or blue.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & of(x2,x3) & n_machinery(x3) & n_piece(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(rel(e1,x3) & n_machine(x3) & a_blue(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_noisy(x2) & n_person(x1))