An older male on a blue boat.
someone is having a birthday
That there is an older male on a boat does not mean he is having a birthday.
exists s1 s2 x1 x2.(a_topic(x1) & on(x1,x2) & n_boat(x2) & a_blue(s2) & Theme(s2,x2) & n_male(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_birthday(x2) & n_person(x1))