Winbugs - Labelling Parameters


I am quite new to Winbugs and I'm using this software to model football data. I managed to get the estimated attacking and defence parameters for each team in the English Premier League.

e.g. a[1] 0.305 is the attacking parameter of the 1st team in ascending order which in our case is arsenal.

When outputting the data how can I output Arsenal instead of a[1].
My data is in xls form.

Thank you very much,
Andrea Farrugia