Three musicians practicing with their musical instruments for tonight's show.
There are three musicians.
Practicing musical instruments is what three musicians are very likely to do.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & for(e1,x5) & n_show(x5) & of(x5,x4) & n_tonight(x4) & with(e1,x3) & n_instrument(x3) & a_musical(s1) & Theme(s1,x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x2) & v_practice(e1) & (x1 = x2) & n_musician(x1) & card_eq_3(x1))
exists p1 x1 x2.((x1 = x2) & n_musician(x2) & card_eq_3(x2))