A white birds lands swiftly in the water.
A blackbird lands on a fence.
A bird cannot land on water band on the fence at the same time.
exists e1 s1 s2 x1 x2.(n_water(x2) & in(e1,x2) & a_swiftly(s2) & Manner(e1,s2) & Actor(e1,x1) & v_land(e1) & n_bird(x1) & a_white(s1) & Theme(s1,x1))
exists s1 x1 x2.(a_topic(x1) & on(x1,x2) & n_fence(x2) & n_land(x1) & a_blackbird(s1) & Theme(s1,x1))