A woman bites her fingernails and looks at a man through a window.
a woman is biting her nails while a man looks through the window.
The difference is perspective: first the woman looks, then the man looks.
exists e2 e1 x1 x2 x3 x4 x5.(through(e2,x5) & n_window(x5) & at(e2,x4) & n_man(x4) & Actor(e2,x3) & v_look(e2) & n_woman(x3) & Theme(e1,x2) & Actor(e1,x1) & v_bite(e1) & n_fingernail(x2) & of(x2,x1) & n_female(x1) & n_woman(x1))
exists e1 p1 x1 x2 x4.(n_window(x4) & exists e2 x3.(through(e2,x4) & Actor(e2,x3) & v_look(e2) & n_man(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_bite(e1) & n_nail(x2) & of(x2,x1) & n_female(x1) & n_woman(x1))