A person is windsurfing in the water.
A person is windsurfing in the water and is on a long vacation
Windsurfing don't mean a long vacation.
exists e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_windsurf(e1) & n_person(x1))
exists e1 p1 x1 x2 x3.(n_water(x2) & exists s1 x4.(on(x3,x4) & n_vacation(x4) & a_long(s1) & Theme(s1,x4)) & n_person(x3) & in(e1,x2) & Actor(e1,x1) & v_windsurf(e1) & n_person(x1))