Two people going through the air with there bikes.
Tow people are going through the air on their snowboards.
The people can't be on their snowboards and on their bikes at the same time.
exists e1 s1 x1 x2 x3 x4.(n_air(x4) & a_topic(x1) & for(e1,s1) & Theme(s1,x2) & a_there(s1) & through(e1,x4) & with(e1,x3) & n_bike(x3) & Actor(e1,x2) & v_go(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_snowboard(x4) & of(x4,x3) & n_thing(x3) & n_air(x3) & through(e1,x3) & on(x3,x4) & Actor(e1,x1) & v_go(e1) & n_people(x1) & (x1 = x2) & ne_nam_tow(x2))