Gender: boy
School:
School #20A
We think this is Szmul because that birthday would seem to indicate that he is indeed Szmul, and also his occupation is "Schueler" which means student. The last name threw us off a bit because they are spelled differently, but they sound similar and it could just be a translation difference.
For address, it shows Blattbin twice, which would indicate that Szmul moved, however we do not know to which apartment on the same street that he moved because it was not listed.