A person and trainer jumping from an airplane.
The two people are in the air.
A person and a trainer are two people.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & from(e1,x4) & n_airplane(x4) & Actor(e1,x3) & v_jump(e1) & (s1 = x3) & n_trainer(x2) & n_person(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists p1 x1 x2.(n_air(x2) & n_people(x1) & card_eq_2(x1) & in(x1,x2))