A group of women wearing all black uniforms play various stringed instruments.
They are good musicians.
Not everyone who plays an instrument are good musicians.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_play(e1) & n_instrument(x4) & a_stringed(s2) & Theme(s2,x4) & a_various(s1) & Theme(s1,x4) & of(x1,x2) & all s3 x5.((n_uniform(x5) & a_black(s3) & Theme(s3,x5)) -> exists e2.(Theme(e2,x5) & Actor(e2,x3) & v_wear(e2))) & (x2 = x3) & n_woman(x2) & n_group(x1))
exists p1 x1.(n_thing(x1) & exists s1 x2.((x1 = x2) & n_musician(x2) & a_good(s1) & Theme(s1,x2)))