A band is playing at an outdoor music festival.
The band plays good folk music.
Not all bands playing at an outdoor music festival play good folk music.
exists e1 s1 x1 x2 x3.(at(e1,x2) & n_festival(x2) & of(x2,x3) & n_music(x3) & a_outdoor(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_band(x1))
exists e1 s1 x1 x2 x3.(n_band(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & of(x2,x3) & n_folk(x3) & a_good(s1) & Theme(s1,x2))