People are strolling across some stores.
The people are walking.
People strolling across stores is likened to people walking while browsing shops.
exists e1 x1 x2.(across(e1,x2) & n_store(x2) & Actor(e1,x1) & v_stroll(e1) & n_people(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_walk(e1))