The marching band practicing outside during the night.
A marching band practices outside.
While sentence one says that the marching band is practicing outside sentence 2 tells us that their practices are outside typically
exists e1 x1 x2 x3 x4.(n_night(x4) & n_practicing(x1) & of(x1,x2) & n_band(x2) & Actor(e1,x1) & v_march(e1) & a_topic(x1) & during(x3,x4) & outside(x1,x3) & n_thing(x3))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(s1,x3) & a_outside(s1) & (x1 = x3) & n_practice(x1) & of(x1,x2) & n_band(x2) & Actor(e1,x1) & v_march(e1))