Band playing in front of a small crowd outside.
A small crowd listens to a charity band outside.
The first sentence only mentions a band, but not necessarily a charity band.
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_outside(x4) & of(x4,x5) & n_crowd(x5) & a_small(s1) & Theme(s1,x4) & n_front(x3) & n_playing(x1) & (x1 = x2) & ne_nam_band(x2))
exists e1 s1 s2 x1 x2 x3.(a_outside(s2) & Manner(e1,s2) & to(e1,x2) & n_band(x2) & of(x2,x3) & n_charity(x3) & Actor(e1,x1) & v_listen(e1) & n_crowd(x1) & a_small(s1) & Theme(s1,x1))