A woman is in the air while wake off a wave.
A woman is surfing.
Wakes of waves can be ridden without necessarily surfing.
exists p1 x1 x2 x3 x4.(n_air(x4) & off(p1,x3) & n_wave(x3) & while(p1,x2) & n_wake(x2) & in(x1,x4) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_surf(e1) & n_woman(x1))