People walk down the busy sidewalk.
Children walk with adults down a busy sidewalk.
It cannot be inferred that children are walking with adults down the sidewalk when the only word used to classify who is walking down the sidewalk is people.
exists e1 s1 x1 x2.(n_sidewalk(x2) & a_busy(s1) & Theme(s1,x2) & down(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 s1 x1 x2 x3.(with(e1,x2) & down(x2,x3) & n_sidewalk(x3) & a_busy(s1) & Theme(s1,x3) & n_adult(x2) & Actor(e1,x1) & v_walk(e1) & n_child(x1))