One black and one brown horse pulling a man in a white shirt on a old tractor.
The horses push an old man's tractor from behind.
The horses can not be pushing and pulling the tractor at the same time
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x5) & n_tractor(x5) & a_old(s4) & Theme(s4,x5) & in(e1,x4) & n_shirt(x4) & a_white(s3) & Theme(s3,x4) & Theme(e1,x3) & Actor(e1,x2) & v_pull(e1) & n_man(x3) & (x1 = x2) & n_horse(x1) & a_brown(s2) & Theme(s2,x1) & card_eq_1(x1) & card_eq_1(x1) & a_black(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_horse(x1) & Theme(e1,x3) & Actor(e1,x1) & v_push(e1) & from(x3,x4) & n_behind(x4) & n_tractor(x3) & of(x3,x2) & n_man(x2) & a_old(s1) & Theme(s1,x2))