A cashier at a grocery store.
A kid is working at a grocery store.
cashier   doesn't always mean kid
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_store(x2) & of(x2,x3) & n_grocery(x3) & n_cashier(x1))
exists e1 x1 x2 x3.(at(e1,x2) & n_store(x2) & of(x2,x3) & n_grocery(x3) & Actor(e1,x1) & v_work(e1) & n_kid(x1))