A wakeboarder in the ocean is in the middle of a flip.
A wakeboarder is in the ocean.
A wakeboarder in the middle of a flip doesn't imply the wakeboarder is doing the flip in the ocean.
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 p1 x1 x2.(n_ocean(x2) & in(x1,x2) & n_wakeboarder(x1))