A gray-haired man singing in a crowd and playing an acoustic guitar.
A man is performing music.
Singing is a form of performing, and guitars play a form or music.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e2,x5) & Actor(e2,x4) & v_play(e2) & n_guitar(x5) & a_acoustic(s2) & Theme(s2,x5) & (x1 = x4) & in(e1,x3) & n_crowd(x3) & Actor(e1,x2) & v_sing(e1) & (x1 = x2) & n_man(x1) & a_gray-haired(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_music(x2) & n_man(x1))