the band Sugarland is performing.
The band Sugarland is performing their best song.
The act of performing by Sugarland does not mean they are performing their best song.
exists e1 x1 x2.(ne_geo_sugarland(x1) & of(x1,x2) & n_band(x2) & Actor(e1,x1) & v_perform(e1))
exists e1 s1 x1 x2 x3.(n_song(x3) & r_most(s1) & a_good(s1) & Theme(s1,x3) & of(x3,x2) & n_thing(x2) & ne_geo_sugarland(x1) & of(x1,x2) & n_band(x2) & Theme(e1,x3) & Actor(e1,x1) & v_perform(e1))