A group of people is gathered outside a building listening to a man on the stairs speak.
A group of people are walking down the stairs.
Walking down the stairs is different than outside a building.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(n_stair(x6) & to(e1,x5) & on(x5,x6) & Actor(e2,x7) & v_speak(e2) & (x6 = x7) & n_man(x5) & outside(e1,x3) & n_listening(x3) & of(x3,x4) & n_building(x4) & Theme(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_stair(x3) & down(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_group(x1))