A man is juggling bottles that are on fire.
A man is performing.
Juggling does not imply performing. The man could be rehearsing.
exists e1 p1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_juggle(e1) & exists x4.(on(x3,x4) & n_fire(x4)) & (x2 = x3) & n_bottle(x2) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_perform(e1) & n_man(x1))