A man sits on a bridge by a river, playing the accordion.
A man in a blue hat sitting playing the accordion
The man could may or may not have a hat on and it could be any color besides blue. The man may actually be standing while playing the accordion instead of sitting.
exists e1 e2 x1 x2 x3 x4.(n_accordion(x4) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & by(e1,x3) & n_river(x3) & on(e1,x2) & n_bridge(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 e2 s1 x1 x2 x3 x4.(n_accordion(x4) & a_topic(x1) & in(x1,x2) & for(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_hat(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))