An older gentleman smiles while he strums a guitar in the street on a sunny day.
A man is playing guitar.
An older gentleman sturns a guitar implies there is a man playing guitar.
exists e1 p1 s1 x1 x3.(n_street(x3) & exists e2 s2 x2 x4.(on(e2,x4) & n_day(x4) & a_sunny(s2) & Theme(s2,x4) & Theme(e2,x2) & Actor(e2,x1) & v_strum(e2) & in(x2,x3) & n_guitar(x2)) & n_male(x1) & while(e1,p1) & Actor(e1,x1) & v_smile(e1) & n_gentleman(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))