Stopping at a red light.
the person is stalled at the moment
if the person has stopped at a red light then they have technically stalled at the moment.
exists e1 s1 x1 x2.(at(e1,x2) & n_light(x2) & a_red(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stop(e1) & n_thing(x1))
exists e1 x1 x2.(n_moment(x2) & n_person(x1) & at(e1,x2) & Theme(e1,x1) & v_stall(e1))