A snowboarder glides through the air.
The female snowboarder is not sitting still.
A snowboarder can be either male or female and not always female.
exists e1 x1 x2.(n_air(x2) & through(e1,x2) & Actor(e1,x1) & v_glide(e1) & n_snowboarder(x1))
exists s1 x1.(n_snowboarder(x1) & a_female(s1) & Theme(s1,x1) & -exists e1 s2.(a_still(s2) & Manner(e1,s2) & Actor(e1,x1) & v_sit(e1)))