A man fly fishes in a large river.
The man is digging a hole
Digging is different than fishes.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_river(x3) & a_large(s1) & Theme(s1,x3) & Actor(e1,x1) & v_fish(e1) & n_fly(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_dig(e1) & n_hole(x2))