Parachuter in midair.
There is someone with a parachute in midair.
if the parachuter is in midair then someone with a parachute is in midair.
exists s1 x1.(ne_nam_parachuter(s1) & a_topic(s1) & in(s1,x1) & n_midair(x1))
exists p1 x1 x2 x3 x4.((x1 = x2) & with(x2,x3) & in(x3,x4) & n_midair(x4) & n_parachute(x3) & n_person(x2))