Man walking by an inflatable playhouse.
Father is by a bouncy castle at his son's birthday.
Not all man is a father. Not all inflatable playhouse is a bouncy castle.
exists s1 x1 x2 x3.(a_topic(x1) & by(x1,x3) & n_playhouse(x3) & a_inflatable(s1) & Theme(s1,x3) & n_walking(x1) & of(x1,x2) & n_man(x2))
exists p1 x1.(ne_nam_father(x1) & exists x2 x3 x4 x5.(by(x1,x2) & at(x2,x5) & n_birthday(x5) & of(x5,x4) & n_son(x4) & of(x4,x2) & n_male(x2) & n_castle(x2) & of(x2,x3) & n_bouncy(x3)))