A tropical fisherman throws an orange net into a river.
A fisherman is fishing.
A fisherman throws an orange net into a river must be fishing.
exists e1 s1 x1 x2 x3 x4.(into(e1,x4) & n_river(x4) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_net(x2) & of(x2,x3) & n_orange(x3) & n_fisherman(x1) & a_tropical(s1) & Theme(s1,x1))
exists p1 x1.(exists x2.((x1 = x2) & n_fishing(x2)) & n_fisherman(x1))