[BioC] Annotation packages: Which Unigene Release?

[Aedin]

Hi,

I have searched the FAQ but can't find the answer to this question.

How can I find out which Unigene Release was used in the creation of an
annotation package.  

For example I am using hgu133plus2 release 1.8.4 (17th May 2005).  Was
this created with Unigene Release 183 or 184?

Thanks a million
Aedin