There is a person standing on top of a stairway outside of a Costco store.
The person on the stairs works at Costco.
Being in the proximity of a Costco store does not always mean one works there. They could be a customer.
exists p1 x1 x2 x3 x4 x5 x6 x7 x8.((x1 = x2) & on(x2,x4) & of(x4,x5) & of(x6,x7) & n_store(x7) & of(x7,x8) & n_costco(x8) & outside(x5,x6) & n_thing(x6) & n_stairway(x5) & n_top(x4) & n_standing(x2) & of(x2,x3) & n_person(x3))
exists e1 x1 x2 x3.(ne_geo_costco(x3) & n_stair(x2) & n_person(x1) & at(e1,x3) & Actor(e1,x1) & v_work(e1) & on(x1,x2))