MicroStrategy Report grouping by two different dates

Hello:

I need to do a MicroStrategy report like that:

Year Items by DATE-1 Items by DATE-2
--- --------------- ---------------
2005 43 30
2004 124 96
2003 112 154
..
..
..

The definition of my base Oracle table is like that:

ITEM_ID NUMBER(,
DATE-1 DATE,
DATE-2 DATE

What attributes, facts, etc have I need and how to do that report?

Notice that I have to group items "from two different date fields of
the same Oracle table" in the same report!!!!...

Dou you know any examples in the Web?

Thanks.