A singer performs with his band mates who are playing guitar and keyboards.
the band is on tour
Not all bands are necessarily be on tour.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(with(e1,x2) & Theme(e2,x5) & Actor(e2,x4) & v_play(e2) & subset_of(x7,x5) & n_keyboard(x7) & subset_of(x6,x5) & n_guitar(x6) & (x2 = x4) & n_mate(x2) & of(x2,x3) & n_band(x3) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_perform(e1) & n_singer(x1))
exists p1 x1.(n_band(x1) & exists x2.(on(x1,x2) & n_tour(x2)))