People riding the escalator rather than taking the stairs.
A church bell ringing.
People riding is not the same thing as a bell ringing.
exists e1 x1 x2 x4.(n_stair(x4) & n_escalator(x2) & -exists e2 x3.(Theme(e2,x4) & Actor(e2,x3) & v_take(e2) & n_people(x3)) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_ring(e1) & (x1 = x3) & n_bell(x1) & of(x1,x2) & n_church(x2))