A group of bicyclists are crossing a bridge.
A small group on bikes cross over a creek.
Not all bridges are over a creek.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_cross(e1) & n_bridge(x3) & of(x1,x2) & n_bicyclist(x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(over(e1,x3) & n_creek(x3) & Actor(e1,x1) & v_cross(e1) & on(x1,x2) & n_bike(x2) & n_group(x1) & a_small(s1) & Theme(s1,x1))