A male sweeping the concrete.
The man is riding a broom through the sky.
You cannot ride a broom through sky and sweep the concrete at same time.
exists e1 x1 x2 x3.(n_concrete(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_sweep(e1) & (x1 = x2) & n_male(x1))
exists e1 x1 x2 x3.(n_sky(x3) & n_man(x1) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_broom(x2))