A person playing a guitar with a capo on the second fret.
A person is singing while playing the guitar.
A person playing the guitar does not have to be singing at the same time.
exists e1 s1 x1 x2 x3 x4 x5.(n_fret(x5) & a_second(s1) & Theme(s1,x5) & a_topic(x1) & with(e1,x4) & on(x4,x5) & n_capo(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_person(x1))
exists e2 e1 x1 x2.(n_guitar(x2) & while(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & Actor(e1,x1) & v_sing(e1) & n_person(x1))