A child in a black coat runs across a graffiti covered bridge.
A child in a red coat walking backwards over a foot bridge.
The child's coat is either black or red.  He cannot be running and walking backwards at the same time.  The bridge is either a covered bridge or a foot bridge.
exists e2 e1 s1 x1 x2 x3 x4.(across(e1,x3) & n_bridge(x3) & Theme(e2,x3) & v_cover(e2) & of(x3,x4) & n_graffitus(x4) & Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_coat(x2) & a_black(s1) & Theme(s1,x2) & n_child(x1))
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & over(e1,x5) & n_bridge(x5) & of(x5,x6) & n_foot(x6) & Theme(e1,x4) & Actor(e1,x3) & v_walk(e1) & n_backward(x4) & (x2 = x3) & n_coat(x2) & a_red(s1) & Theme(s1,x2) & n_child(x1))