People gather by the edge of the water.
The people saw a large fish jump out of the water.
Just because people are at the edge of the water doesn't imply they saw large fish.
exists e1 x1 x2 x3.(n_water(x3) & n_edge(x2) & by(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 s1 x1 x2 x3 x4 x5.(n_water(x5) & n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_see(e1) & of(x4,x5) & out(x2,x4) & n_thing(x4) & n_jump(x2) & of(x2,x3) & n_fish(x3) & a_large(s1) & Theme(s1,x2))