BUG: handle the case where data files are 3-items tuple.
BUG: handle the case where data files are 3-items tuple.

abadger/Bento,cournape/Bento,cournape/Bento,abadger/Bento,abadger/Bento,cournape/Bento,cournape/Bento,abadger/Bento