Man standing in the water while other men on bridge watch him.
There is a man being watched
If the men on the bridge watch the other man, he must then be being watched.
(x)
exists p1 x1 e1 x2 x3.((x1 = x2) & Theme(e1,x3) & v_watch(e1) & (x2 = x3) & n_man(x2))