A man dressed in a green jacket is playing piano while a woman sings.
A man is playing the piano.
" A man is playing the piano " is less descriptive.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(while(e2,x5) & n_sing(x5) & of(x5,x6) & n_woman(x6) & Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & n_piano(x4) & in(e1,x3) & n_jacket(x3) & a_green(s1) & Theme(s1,x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_piano(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))