A couple walks down the street holding hands while a man plays music.
A man and his girlfriend are taking a romantic walk.
The couple in question could simply be walking down the boardwalk to get a burger or ride a ride, get an ice cream cone or simply enjoy the sight of the sea at sunset. There is no implication of romanticism in the walk they are taking, they could be arguing while holding hands for all we know from sentence 1.
exists e1 e2 p1 x1 x2 x3.(n_street(x2) & for(e1,e2) & exists e3 x4 x5.(Theme(e3,x5) & Actor(e3,x4) & v_play(e3) & n_music(x5) & n_man(x4)) & while(e2,p1) & Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & n_hand(x3) & down(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_couple(x1))
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_walk(x4) & a_romantic(s1) & Theme(s1,x4) & subset_of(x3,x1) & n_girlfriend(x3) & of(x3,x2) & n_male(x2) & subset_of(x2,x1) & n_man(x2))