A person kayaking in strong currents.
The water current is strong for the kayaker.
A kayaker is a person.  Current is strong is a restatement for strong currents.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_current(x3) & a_strong(s1) & Theme(s1,x3) & Actor(e1,x2) & v_kayake(e1) & (x1 = x2) & n_person(x1))
exists s1 x1 x2 x3.(n_kayaker(x3) & n_current(x1) & of(x1,x2) & n_water(x2) & for(s1,x3) & Theme(s1,x1) & a_strong(s1))