A singer in a white button-down shirt is performing while a girl plays the guitar in the back.
A two-piece combo is putting on a show on the riverfront.
The singer and guitar player could be playing anywhere and it is not indicated if it is a show or a practice.
exists e1 p1 s1 s2 x1 x2 x4 x5.(n_back(x5) & n_guitar(x4) & exists e2 x3.(in(e2,x5) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_girl(x3)) & while(e1,p1) & Actor(e1,x1) & v_perform(e1) & in(x1,x2) & n_shirt(x2) & a_button-down(s2) & Theme(s2,x2) & a_white(s1) & Theme(s1,x2) & n_singer(x1))
exists e1 s1 x1 x2 x3 x4.(n_riverfront(x4) & on(e1,x3) & on(x3,x4) & n_show(x3) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_thing(x2) & n_combo(x1) & a_two-piece(s1) & Theme(s1,x1))