A man wakeboards in the water.
A man is in the water.
A man that wakeboard in the water must be in the water.
exists x1 x2 x3.(n_water(x3) & a_topic(x1) & in(x1,x3) & n_wakeboard(x1) & of(x1,x2) & n_man(x2))
exists p1 x1 x2.(n_water(x2) & in(x1,x2) & n_man(x1))