A woman is weighing something while a man is sitting down.
A man is standing up.
One cannot be sitting down and standing up simultaneously.
exists e1 p1 x1 x2.(exists e2 s1 x3.(a_down(s1) & Manner(e2,s1) & Actor(e2,x3) & v_sit(e2) & n_man(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_weigh(e1) & n_thing(x2) & n_woman(x1))
exists e1 s1 x1.(a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))