A young girl plays the electric guitar on her bed.
A girl is playing guitar
Playing guitar is a rephrase of plays the electric guitar.
exists e1 s1 s2 x1 x2 x3.(n_bed(x3) & of(x3,x2) & n_female(x2) & n_guitar(x2) & a_electric(s2) & Theme(s2,x2) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_girl(x1))