A man kayaking through rapids.
the man is kayaking in a river
To be kayaking through rapids is to be in a river.
exists e1 x1 x2 x3.(a_topic(x1) & through(e1,x3) & n_rapid(x3) & Actor(e1,x2) & v_kayake(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & in(e1,x2) & n_river(x2) & Actor(e1,x1) & v_kayake(e1))