Why, if it is n't Bilbo Baggins, playing the accordion.
It isn't Bilbo Baggins playing the accordion.
Why, if says that Bilbo Baggins is there playing the accordion while sentence 2 says that it isn't.
exists x1 x2 x3 x5.(n_accordion(x5) & ne_per_baggins(x2) & (x2 = x3) & ne_per_bilbo(x3) & n_thing(x1) & (-exists e2 e1 x4.(Theme(e2,x2) & Actor(e2,x1) & v_be(e2) & Theme(e1,x5) & Actor(e1,x4) & v_play(e1) & (x2 = x4)) -> exists x6.(r_why(x6) & n_event(x6))))
exists x1 x2 x3 x5.(n_accordion(x5) & ne_per_baggins(x2) & (x2 = x3) & ne_per_bilbo(x3) & n_thing(x1) & -exists e2 e1 x4.(Theme(e2,x2) & Actor(e2,x1) & v_be(e2) & Theme(e1,x5) & Actor(e1,x4) & v_play(e1) & (x2 = x4)))