A young performer singing and playing electric guitar.
A cat plays the piano.
It would be particularly difficult for a performer to play the electric guitar and piano at once, and all the more difficult if that performer was a cat.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_guitar(x4) & a_electric(s4) & Theme(s4,x4) & n_performer(x3) & a_young(s3) & Theme(s3,x3) & Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_guitar(x2) & a_electric(s2) & Theme(s2,x2) & n_performer(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_piano(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_cat(x1))