__datafile1__
ABC Corp.

1   200210014   200210105   some text description
2   200211011   200212053   some text description
3   200323021   200331234   some text description

XYZ Ltd.

1   200210014   200210105   some text description
2   200211011   200212053   some text description

CDC Inc.

1   200110014   200110325   some text description
2   200534011   200577234   some text description
3   200212344   200232399   some text description
4   199989987   199999991   some text description

__datafile2__
ID,Address,MoreData
200110100,some text here,etc
200918943,some text here,etc
200211015,some text here,etc
199212395,some text here,etc
200110100,some text here,etc
200210100,some text here,etc
...