Man works grill at carnival food stand.
The man is operating a roller coaster.
carnival food stand and roller coaster work are different.
exists e1 s1 x1 x2 x3 x4.(ne_nam_man(x1) & at(e1,x3) & n_stand(x3) & of(x3,x4) & n_food(x4) & a_carnival(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_work(e1) & n_grill(x2))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_coaster(x2) & of(x2,x3) & n_roller(x3))