A woman and a child are walking on a leaf-lined sidewalk, heading towards two people riding horses.
A woman and her child are walking down a slippery sidewalk towards police on horses.
Just because the sidewalk is leaf lined does not mean that it is slippery.  The two people that are riding the horses do not have to be police.
exists e1 e3 e2 s1 x1 x2 x3 x4 x5 x6 x7.(for(e1,e2) & towards(e2,x5) & Theme(e3,x7) & Actor(e3,x6) & v_ride(e3) & n_horse(x7) & (x5 = x6) & n_people(x5) & card_eq_2(x5) & Actor(e2,x1) & v_head(e2) & on(e1,x4) & n_sidewalk(x4) & a_leaf-lined(s1) & Theme(s1,x4) & Actor(e1,x1) & v_walk(e1) & subset_of(x3,x1) & n_child(x3) & subset_of(x2,x1) & n_woman(x2))
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(on(e1,x7) & n_horse(x7) & towards(e1,x6) & n_police(x6) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x1) & v_walk(e1) & n_sidewalk(x4) & of(x4,x5) & n_slippery(x5) & subset_of(x3,x1) & n_child(x3) & of(x3,x2) & n_female(x2) & subset_of(x2,x1) & n_woman(x2))