A group of rollerblading on a sloping road.
The road is flat
flat and sloping are different descriptions.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_road(x3) & of(x3,x4) & n_sloping(x4) & Actor(e1,x2) & v_rollerblade(e1) & (x1 = x2) & n_group(x1))
exists s1 x1.(n_road(x1) & Theme(s1,x1) & a_flat(s1))