Bicyclists waiting at an intersection.
A group of bicyclists remain on the sidewalk at the intersection.
Just because a bicyclists is waiting at an intersection doesn't imply that they are on a sidewalk.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_intersection(x3) & Actor(e1,x2) & v_wait(e1) & (x1 = x2) & n_bicyclist(x1))
exists e1 x1 x2 x3 x4.(n_intersection(x4) & n_sidewalk(x3) & on(e1,x3) & at(x3,x4) & Actor(e1,x1) & v_remain(e1) & of(x1,x2) & n_bicyclist(x2) & n_group(x1))