Two young fair girls are smiling a posing together while they ride in a boat wearing floatation vests.
The twin girls celebrate their birthday aboard the cruise ship.
Two young fair girls are not necessarily twin girls who celebrate their birthday aboard the cruise ship.
exists e1 p1 s1 s2 s3 x1 x2.(exists e3 e2 x3 x4 x5 x6.(in(e2,x3) & Theme(e3,x5) & Actor(e3,x4) & v_wear(e3) & n_vest(x5) & of(x5,x6) & n_floatation(x6) & (x3 = x4) & n_boat(x3) & Actor(e2,x1) & v_ride(e2)) & n_thing(x1) & while(e1,p1) & a_together(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_smile(e1) & n_pose(x2) & n_girl(x1) & a_fair(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(n_ship(x3) & of(x3,x4) & n_cruise(x4) & n_birthday(x2) & of(x2,x1) & n_thing(x1) & n_girl(x1) & a_twin(s1) & Theme(s1,x1) & aboard(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_celebrate(e1))