This man is kayaking in whitewater.
This man is kayaking in his bathtub.
Bathtub and whitewater are different.
exists e1 x1 x2.(n_man(x1) & in(e1,x2) & n_whitewater(x2) & Actor(e1,x1) & v_kayake(e1))
exists e1 x1 x2.(n_bathtub(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_kayake(e1))