A man walks his bike near a metro sign.
a guy rides his bike to the metro
One cannot walk while he rides at the same time.
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & near(x2,x3) & n_sign(x3) & of(x3,x4) & n_metro(x4) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists e1 x1 x2 x3.(n_metro(x3) & to(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_guy(x1))