Observers stare at a giant christmas tree on the sidewalk.
A crowd is on the road.
An unspecified number of observers do not necessarily constitute a crowd, and just because they are staring at something on the sidewalk does not mean that they are on the road.
exists e1 s1 x1 x2 x3 x4.(n_sidewalk(x4) & at(e1,x2) & on(x2,x4) & n_tree(x2) & of(x2,x3) & n_christmas(x3) & a_giant(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stare(e1) & n_observer(x1))
exists p1 x1 x2.(n_road(x2) & on(x1,x2) & n_crowd(x1))