Three musicians in a recording studio.
A rock band makes a record.
We don't know that it is a rock band.
exists x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_studio(x2) & of(x2,x3) & n_recording(x3) & n_musician(x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_make(e1) & n_record(x3) & n_band(x1) & of(x1,x2) & n_rock(x2))