Four people are playing drums.
People are giving a performance for an audience.
People playing drums does not imply that they are giving a performance.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_drum(x2) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_audience(x3) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_performance(x2) & n_people(x1))