Men performing in front of a crowd.
The men are performing in their garage by themselves.
If they are in front of a crowd, they are not by themselves.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & of(x3,x4) & n_crowd(x4) & n_front(x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_group(x3) & n_garage(x2) & of(x2,x1) & n_thing(x1) & n_man(x1) & by(e1,x3) & in(e1,x2) & Actor(e1,x1) & v_perform(e1))