The kayaker braces himself as he goes down the river.
The kayaker is a woman
The Kayaker can either be ea man or a woman. Not both
exists e1 p1 x1 x2 x3.(n_river(x3) & n_male(x2) & n_male(x2) & n_kayaker(x1) & exists e2.(down(e2,x3) & Actor(e2,x2) & v_go(e2)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_brace(e1))
exists p1 x1.(n_kayaker(x1) & exists x2.((x1 = x2) & n_woman(x2)))