A group of people is gathered outside a building listening to a man on the stairs speak.
A large group of people is gathered listening to a man speak.
Just because a group is standing outside that does not mean it is large.
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 e2 e1 p1 s1 x1 x2 x3.(Actor(e2,x1) & v_speak(e2) & of(x1,x2) & exists e3 x4.(to(e3,x4) & n_man(x4) & Actor(e3,x3) & v_listen(e3)) & Recipient(e1,p1) & Topic(e1,x3) & v_gather(e1) & (x2 = x3) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))