Sidewalk with reduce speed sign on the left.
There is a street sign on the sidewalk.
A reduce speed sign is a street sign.
exists s1 x1 x2 x3 x4.(n_left(x4) & a_topic(x1) & with(x1,x2) & on(x2,x4) & n_sign(x2) & of(x2,x3) & n_speed(x3) & a_reduce(s1) & Theme(s1,x2) & n_sidewalk(x1))
exists p1 x1 x4.(n_sidewalk(x4) & exists x2 x3.((x1 = x2) & on(x2,x4) & n_sign(x2) & of(x2,x3) & n_street(x3)))