A man in a yellow shirt juggles knives.
A man juggles.
The man in sentence one is the same man in sentence two.  Juggling knives means that someone is juggling.
exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & n_knife(x2) & of(x2,x4) & n_juggle(x4) & of(x2,x3) & n_shirt(x3) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & n_juggle(x1) & of(x1,x2) & n_man(x2))