Two people are on top of the bed of a truck.
Two country boys hanging out.
Not all people on top of the bed of a truck are country boys.
exists p1 x1 x3.(n_bed(x3) & exists x2 x4.(on(x1,x2) & of(x2,x3) & of(x3,x4) & n_truck(x4) & n_top(x2)) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_out(s1) & Manner(e1,s1) & Actor(e1,x3) & v_hang(e1) & (x1 = x3) & n_boy(x1) & of(x1,x2) & n_country(x2) & card_eq_2(x1))