The couple is together looking at the large ship in the ocean.
The couple are on a cruise looking at another cruise ship.
WE DON'T KNOW THAT THE COUPLE IS LOOKING AT ANOTHER CRUISE SHIP.
exists e1 s1 s2 x1 x2 x3.(n_ocean(x3) & n_ship(x2) & a_large(s1) & Theme(s1,x2) & n_couple(x1) & a_together(s2) & Manner(e1,s2) & at(e1,x2) & in(x2,x3) & Actor(e1,x1) & v_look(e1))
exists e1 p1 x1 x2 x3 x4.(n_couple(x1) & for(p1,e1) & at(e1,x4) & n_ship(x4) & of(x4,x3) & n_cruise(x3) & -(x4 = x2) & n_ship(x2) & of(x2,x3) & Actor(e1,x1) & v_look(e1) & exists x5.(on(x1,x5) & n_cruise(x5)))