Three people in a band are playing on stage.
Three men sing while playing banjos at the amphitheater.
The people might not all be men, they may not sing at all or play banjos and don't have to be performing at an amphitheater.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_band(x2) & n_people(x1) & card_eq_3(x1))
exists e2 e1 x1 x2 x3.(n_amphitheater(x3) & while(e1,e2) & at(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & n_banjo(x2) & Actor(e1,x1) & v_sing(e1) & n_man(x1) & card_eq_3(x1))