A man in a parking lot with the tailgate of his truck down so he can sit on it.
A man is sitting.
The man has pulled down his tailgate to sit on it, which is the same as sitting.
exists p1 x1 x2 x3 x4 x5 x6.(n_thing(x4) & n_male(x4) & n_male(x4) & n_truck(x5) & of(x5,x4) & n_tailgate(x4) & a_topic(x1) & in(x1,x2) & exists e1 p2.(exists e2.(on(e2,x4) & Actor(e2,x4) & v_sit(e2)) & Topic(e1,p2) & Actor(e1,x4) & v_can(e1)) & that(x2,p1) & with(x2,x4) & of(x4,x5) & down(x5,x6) & n_so(x6) & n_lot(x2) & of(x2,x3) & n_parking(x3) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_man(x1))