Three musicians in a recording studio.
Folks making music.
Three musicians is a rephrasing of folks. If they are in a recording studio, they would be making music.
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.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_make(e1) & n_music(x3) & (x1 = x2) & n_folk(x1))