A Marching Band practicing at night.
It is daytime.
When it is night, it is not daytime.
exists e1 x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_night(x3) & n_practicing(x1) & of(x1,x2) & n_band(x2) & Actor(e1,x1) & v_march(e1))
exists s1 x1.(n_thing(x1) & Theme(s1,x1) & a_daytime(s1))