A man helps a little girl ride a bike.
A teenager is learning to drive a car.
A man a girl can not be a singular teenager. One can not ride a bike and drive a car simultaneously.
exists e1 e2 s1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_ride(e2) & n_bike(x4) & Theme(e1,x3) & Actor(e1,x2) & v_help(e1) & n_girl(x3) & a_little(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_learn(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_drive(e2) & n_car(x2)) & n_teenager(x1))