Four musicians playing in a church.
A choir playing for a congregation.
Four musicians does not comprise an entire choir, and just because they are playing in a church does not mean it is before a congregation.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_church(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_musician(x1) & card_eq_4(x1))
exists s1 x1 x2.(a_topic(x1) & for(x1,x2) & n_congregation(x2) & n_playing(x1) & a_choir(s1) & Theme(s1,x1))