A snowboarder performs a grab trick in the air.
A surfer rides a huge wave.
The athlete cannot be both a snowboarder and a surfer, since those two activities require very different environments.
exists e1 x1 x2 x3 x4.(n_air(x4) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & of(x2,x3) & n_grab(x3) & n_snowboarder(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wave(x2) & a_huge(s1) & Theme(s1,x2) & n_surfer(x1))