A person attached to a harness is being dragged through the water.
A person is paraskiing in the water.
Just because they are dragged through the water does not mean that one is paraskiing.
exists e1 e2 x1 x2 x3 x4.(n_water(x4) & through(e2,x4) & Theme(e2,x1) & v_drag(e2) & to(e1,x3) & n_harness(x3) & Theme(e1,x2) & v_attach(e1) & (x1 = x2) & n_person(x1))
exists e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_paraskie(e1) & n_person(x1))