Two people walking down an alley.
The pair of people are walking down the highway.
It is impossible for a person to be walking down an alley and a highway at the same time because it is impossible to be in two locations at once
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_alley(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_highway(x3) & n_pair(x1) & down(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2))