A band appears to be playing bluegrass music at an indoor musical event.
A rock band is playing outside.
A rock band does not play bluegrass music. A band cannot play indoor and outdoor simultaneously.
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_appear(e1) & exists e2 s1 s2 s3 x2 x3.(at(e2,x3) & n_event(x3) & a_musical(s3) & Theme(s3,x3) & a_indoor(s2) & Theme(s2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & n_music(x2) & a_bluegrass(s1) & Theme(s1,x2)) & n_band(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_outside(x3) & n_band(x1) & of(x1,x2) & n_rock(x2))