A worker uses a jackhammer on the street.
A person is sitting in a car.
A person can be a worker. One cannot be on the street and sitting in a car at the same time.
exists e1 x1 x2 x3.(n_street(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_jackhammer(x2) & n_worker(x1))
exists e1 x1 x2.(in(e1,x2) & n_car(x2) & Actor(e1,x1) & v_sit(e1) & n_person(x1))