A man is kayaking in the ocean.
A man is kayaking in an ocean race.
Kayaking is not necessarily in an ocean race.
exists e1 x1 x2.(n_ocean(x2) & in(e1,x2) & Actor(e1,x1) & v_kayake(e1) & n_man(x1))
exists e1 x1 x2 x3.(in(e1,x2) & n_race(x2) & of(x2,x3) & n_ocean(x3) & Actor(e1,x1) & v_kayake(e1) & n_man(x1))