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Need help finding the correct start date for acct_2. Input is sorted by start_date. 
Please find below Input and Output:

Hi All,
Given the following data sorted by Name and Date:
Name      Status      Date
Bob        A           2013-08-01
Bob        A           2013-08-04
Bob        C           2013-09-13
Sally       A           2013-04-17
Sally       C           2013-06-07
Sally       C           2013-07-09