Man standing on the sidewalk next to the street holding a guitar.
A human outdoors with a musical device.
A man is a human, and a guitar is a musical device.  The man is on a sidewalk so the man is outdoors.
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_street(x5) & n_sidewalk(x3) & a_topic(x1) & on(x1,x3) & to(x4,x5) & Theme(e1,x7) & Actor(e1,x6) & v_hold(e1) & n_guitar(x7) & (x5 = x6) & next(x3,x4) & n_thing(x4) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists s1 s2 x1 x2.(a_topic(x1) & with(x1,x2) & n_device(x2) & a_musical(s2) & Theme(s2,x2) & n_outdoors(x1) & a_human(s1) & Theme(s1,x1))