A wakeboarder in the ocean is in the middle of a flip.
The wakeboarder is practicing for a tournament.
a flip doesn't imply  tournament.
exists p1 x1 x2 x3.(n_middle(x3) & n_ocean(x2) & exists x4.(in(x1,x3) & of(x3,x4) & n_flip(x4)) & in(x1,x2) & n_wakeboarder(x1))
exists e1 x1 x2.(n_wakeboarder(x1) & for(e1,x2) & n_tournament(x2) & Actor(e1,x1) & v_practice(e1))