Play Indexing

1. For games having JSON data source (that is, having a record of every drive and every play)
   1. Prepare spreadsheet by adding Drive sequence numbers in column BC and play sequence numbers in column BD
   2. Drive-related Properties
      1. Sequential Number of Each Drive in Game (P35)
      2. Team on Offense (P24)
      3. Team on Defense (P25)
      4. Occurring in Game Period (P8)
      5. Game Clock Display at Start (P34)
      6. Has Starting Yard Line (P13)
      7. Drive Result (P33)
      8. Length of Drive in Yards (P26)
      9. Length of Drive Elapsed Time (P27) (convert to seconds)
      10. Length of Drive in Number of Plays (P28)
   3. Play-related Properties
      1. Sequential Number of Each Play in Game (P19)
      2. Has Point in Time (P9)
      3. Home Team Score at Start of Play (P10)
      4. Away Team Score at Start of Play (P11)
      5. Team on Offense (P24)
      6. Team on Defense (P25)
      7. Occurring in Game Period (P8)
      8. Game Clock Display at Start (P34)
      9. Has Starting Yard Line (P13)