Four musicians performing on the street.
A person is driving in the street.
A person is one single person and four musicians is four people and there cannot be both there.
exists e1 x1 x2 x3.(n_street(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_musician(x1) & card_eq_4(x1))
exists e1 x1 x2.(n_street(x2) & in(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_person(x1))