A man in a blue kayak paddles in water.
The kayak is seaworthy.
If the kayak is being paddled by someone in the water, it must be seaworthy if it's on the sea.
exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & in(x2,x4) & n_water(x4) & n_paddle(x2) & of(x2,x3) & n_kayak(x3) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists s1 x1.(n_kayak(x1) & Theme(s1,x1) & a_seaworthy(s1))