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 person is holding a musical instrument.
A man is a person, and tuning a instrument implies it is a musical instrument. One must be holding an instrument in order to be tuning it.
(x)
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_instrument(x2) & a_musical(s1) & Theme(s1,x2) & n_person(x1))