Three members of a rock band are on stage in front of a crowd, one playing guitar, one playing drums, and one playing bass, with a large, lit-up "W" logo hanging behind them and smoke surrounding them.
Some artists performing today a hard rock.
A rock band does not necessarily play hard rock music. A band is not necessarily performing today.
exists e1 p1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16 x17 x18.(behind(p1,x16) & subset_of(x17,x16) & Theme(e1,x1) & Actor(e1,x18) & v_surround(e1) & n_thing(x1) & n_thing(x1) & (x17 = x18) & n_smoke(x17) & subset_of(x1,x16) & Time(p1,x15) & n_logo(x15) & Time(p1,x14) & n_hanging(x14) & in(p1,x4) & with(x4,x13) & ne_nam_w(x13) & a_''(s4) & Theme(s4,x13) & a_lit-up(s3) & Theme(s3,x13) & a_,(s2) & Theme(s2,x13) & a_large(s1) & Theme(s1,x13) & of(x4,x5) & rel(x5,x6) & rel(x6,x8) & subset_of(x11,x8) & Time(x11,x12) & n_bass(x12) & n_playing(x11) & card_eq_1(x11) & subset_of(x9,x8) & n_drum(x9) & of(x9,x10) & n_playing(x10) & card_eq_1(x9) & n_guitar(x6) & of(x6,x7) & n_playing(x7) & card_eq_1(x6) & n_crowd(x5) & n_front(x4) & exists x19.(on(x1,x19) & n_stage(x19)) & of(x1,x2) & n_band(x2) & of(x2,x3) & n_rock(x3) & n_member(x1) & card_eq_3(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Time(e1,x4) & n_today(x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_rock(x3) & a_hard(s1) & Theme(s1,x3) & (x1 = x2) & n_artist(x1))