Three white men singing and performing on stage at a concert.
A group of men are on stage.
Three men are singing on stage, so a group of men are on stage.
exists e1 e2 s1 s2 x1 x2 x3 x4.(at(e2,x4) & n_concert(x4) & on(e2,x3) & n_stage(x3) & Actor(e2,x2) & v_perform(e2) & n_man(x2) & a_white(s2) & Theme(s2,x2) & card_eq_3(x2) & Actor(e1,x1) & v_sing(e1) & n_man(x1) & a_white(s1) & Theme(s1,x1) & card_eq_3(x1))
exists p1 x1 x2.(exists x3.(on(x1,x3) & n_stage(x3)) & of(x1,x2) & n_man(x2) & n_group(x1))