People walk across a crosswalk.
people are jogging on a trail
crosswalk and trail are two different things
exists e1 x1 x2.(across(e1,x2) & n_crosswalk(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2.(on(e1,x2) & n_trail(x2) & Actor(e1,x1) & v_jog(e1) & n_people(x1))