Mother holds her young son while they look on as fish swim in an aquarium.
Mother and son watch a fish.
mother and son watch as the fish swim. It could be watching a fish swim.
exists e1 p1 s1 x1 x2.(n_thing(x2) & n_son(x2) & a_young(s1) & Theme(s1,x2) & of(x2,x1) & n_female(x1) & ne_nam_mother(x1) & exists e2 x3 x4 x5.(in(e2,x5) & n_aquarium(x5) & r_on(e2) & as(e2,x3) & n_swim(x3) & of(x3,x4) & n_fish(x4) & Actor(e2,x2) & v_look(e2)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1))
exists e1 x1 x2 x3 x4.(ne_nam_mother(x2) & Theme(e1,x4) & Actor(e1,x1) & v_watch(e1) & n_fish(x4) & subset_of(x3,x1) & n_son(x3) & subset_of(x2,x1))