A man is playing his guitar at Joe's Cafe.
A musician is performing a song.
The musician is a man and playing his guitar is another way of saying performing a song.
exists e1 x1 x2 x3 x4.(ne_org_cafe(x4) & of(x4,x3) & ne_org_joe(x3) & at(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_song(x2) & n_musician(x1))