An old man in shorts and white spotted black socks sits outside playing an accordion.
The old man is playing an instrument outdoors.
The instrument is an accordion.  The sentence goes from broad to more defined from sentence 1 to 2.
exists e2 e1 s1 s2 s3 s4 s5 x1 x2 x3 x4 x5.(for(e1,e2) & Theme(e2,x5) & Actor(e2,x1) & v_play(e2) & n_accordion(x5) & a_outside(s5) & Manner(e1,s5) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & subset_of(x4,x2) & n_sock(x4) & a_black(s4) & Theme(s4,x4) & a_spotted(s3) & Theme(s3,x4) & a_white(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_shorts(x3) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_man(x1) & a_old(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_outdoors(x2) & of(x2,x3) & n_instrument(x3))