A man with long gray hair while wearing a suit is tuning a instrument near some microphones on stands while having nearby musical equipment nearby and as the background.
A guitarist is tuning his guitar.
Answer :Not all men are guitarist. The fact that the man is tuning a instrument does not mean that he is tuning his guitar
(x)
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_tune(e1) & n_guitar(x2) & of(x2,x1) & n_male(x1) & n_guitarist(x1))