A man in a helmet is riding a bike.
A woman is driving a car.
It is either a man or a woman, and the person can't ride a bike and be in the car at the same time.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & in(x1,x2) & n_helmet(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_car(x2) & n_woman(x1))