Need advice for Facebook birthday selectors

[oly]

I’m trying to get the list of people who have birthdays today on Facebook, but the div class is inconsistent on the page - I see _tzn and _tzn lfloat _ohe. If I use selector as below for scrapping, it will return only half of names. If I try _tzn* - nothing is returned. Any good ideas how to get complete list? Happy to work with iteration of fields if that would be a solution instead of scrapping a table.

<extract>
	<row exact="1">
		<webctrl tag="div" class="_tzn" idx="1"/>
	</row>
	<column exact="0" name="Column1" attr="text">
		<webctrl tag="div" class="_tzn" idx="1"/>
		<webctrl tag="a" idx="1"/>
	</column>
</extract>