An old woman is explaining old artifacts in a museum to a class.
The old woman is actually a man.
One cannot be a man and a woman at the same time.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_explain(e1) & in(x2,x3) & to(x3,x4) & n_class(x4) & n_museum(x3) & n_artifact(x2) & a_old(s2) & Theme(s2,x2) & n_woman(x1) & a_old(s1) & Theme(s1,x1))
exists p1 s1 s2 x1.(n_woman(x1) & a_old(s1) & Theme(s1,x1) & a_actually(s2) & Manner(p1,s2) & exists x2.((x1 = x2) & n_man(x2)))