There is a person on a snowboard up high in the air.
A person is snowboarding.
person on a snowboard means someone is snowboarding.
exists p1 x1 x5.(n_air(x5) & exists s1 x2 x3 x4.((x1 = x2) & on(x2,x3) & r_up(s1) & in(s1,x5) & Theme(s1,x4) & a_high(s1) & (x3 = x4) & n_snowboard(x3) & n_person(x2)))
exists e1 x1.(Actor(e1,x1) & v_snowboard(e1) & n_person(x1))