A group of people are looking at the river.
there is people looking at this river
people are looking at the river. means people looking at this river
exists e1 x1 x2 x3.(n_river(x3) & at(e1,x3) & Actor(e1,x1) & v_look(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 x4.(n_river(x4) & exists e1 x2 x3.((x1 = x2) & at(e1,x4) & Actor(e1,x3) & v_look(e1) & (x2 = x3) & n_people(x2)))