An older woman is showing a younger woman how to play the piano
The younger woman is learning to play a song on the piano.
A person can learn how to play the piano without necessarily playing a song.
exists e1 p1 s1 s2 x1 x2 x3.(n_piano(x3) & Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & Topic(x2,p1) & exists e2.(Theme(e2,x3) & Actor(e2,x2) & v_play(e2)) & n_woman(x2) & r_more(s2) & a_younger(s2) & Theme(s2,x2) & n_woman(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x3.(n_piano(x3) & n_woman(x1) & r_more(s1) & a_younger(s1) & Theme(s1,x1) & Topic(e1,p1) & Actor(e1,x1) & v_learn(e1) & exists e2 x2.(on(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & n_song(x2)))