==Cleaning firmbase==
NOTE FROM MEGHANA:
The base table - firmbase - was reloaded (as 'firms' right now) after it was found to be incorrectly normalized.
Retrieving_US_VC_Data_From_SDC#VC_Funds was corrected
The code below HAS NOT been rerun! DO NOT TRUST THE TABLES BELOW!!!
First flag the undisclosed funds.
The firmbase table contains undisclosed firms. Add a flag and remove them. Then use firmname, statecode, foundingdate as the key for this table. Check that is valid and make your core table.