A young man playing the xylophone.
girl reads book
It is either a young man or a girl, not both, and they cannot be playing the xylophone and reading at the same time.
exists e1 s1 x1 x2 x3.(n_xylophone(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2) & n_girl(x1))