A man is catching air while snowboarding.
A man is putting on his skis.
Skis and snowboarding are two different things.
exists e1 e2 x1 x2.(while(e1,e2) & Actor(e2,x1) & v_snowboard(e2) & Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_air(x2) & n_man(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_ski(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_thing(x2) & n_man(x1))