A person in a purple and white jacket is standing behind a man with a gray shirt while a woman with a purse passes them, going the opposite direction.
A person is behind a man and woman.
A person is standing behind a man and a woman is passing them therefore there is a person between two people, behind them in their respective directions.
exists e1 e2 p1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(n_direction(x7) & a_opposite(s3) & Theme(s3,x7) & n_thing(x7) & for(e1,e2) & Theme(e2,x7) & Actor(e2,x1) & v_go(e2) & exists e3 x8 x9.(Theme(e3,x7) & Actor(e3,x8) & v_pass(e3) & with(x8,x9) & n_purse(x9) & n_woman(x8)) & while(e1,p1) & behind(e1,x5) & with(x5,x6) & n_shirt(x6) & a_gray(s2) & Theme(s2,x6) & n_man(x5) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_jacket(x4) & a_white(s1) & Theme(s1,x4) & n_purple(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_person(x1))
exists p1 x1.(exists x2 x3 x4.(behind(x1,x2) & n_woman(x4) & n_man(x3) & subset_of(x4,x2) & subset_of(x3,x2)) & n_person(x1))