*.mdb file's consulting

Hey, I've downloaded the source data, but there's only data.mdb and lock.mdb file. But, I can't access them for lacking of the database's information.
something like this:
# connStr = (
# r'Driver={SQL Sever};'
# r'Server=sqlserver;'
# r'Database=bill;'
# r'UID=sa;'
# r'PWD=passwd'
# )

I would like to know if txt_db stores sentences and img_db stores npz files?
@lichengunc @linjieli222

Start by reviewing the source-data references to data.mdb, lock.mdb, txt_db, and img_db. Confirm what database information is required to access the files and whether txt_db stores sentences and img_db stores NPZ files; done means documenting those details for users.

Written by the indexing model from the issue text.