The man is playing guitar and sitting with a cat.
The man is playing music for his friends.
The fact that man is playing guitar doesn't imply that he playing music for his friends.
exists e2 e1 x1 x2 x3.(n_man(x1) & with(e2,x3) & n_cat(x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2))
exists e1 x1 x2 x3.(n_friend(x3) & of(x3,x1) & n_male(x1) & n_man(x1) & for(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2))