A woman with a floral shirt and purse and a man with a black shirt are walking while another man walks behind them.
A man follows after a couple along the street
walking doesn't always  street
exists e1 p1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(exists e2 x8.(behind(e2,x2) & Actor(e2,x8) & v_walk(e2) & n_man(x8) & -(x8 = x6)) & n_thing(x2) & n_man(x6) & n_man(x6) & while(e1,p1) & Actor(e1,x1) & v_walk(e1) & subset_of(x6,x1) & with(x6,x7) & n_shirt(x7) & a_black(s2) & Theme(s2,x7) & subset_of(x2,x1) & with(x2,x3) & n_purse(x5) & n_shirt(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_floral(s1) & Theme(s1,x3) & n_woman(x2))
exists e1 x1 x2 x3.(n_street(x3) & after(e1,x2) & along(x2,x3) & n_couple(x2) & Actor(e1,x1) & v_follow(e1) & n_man(x1))