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. Instance of (P17)
      2. Sequential Number of Drive in Game (P35)
      3. Team on Offense (P24)
      4. Team on Defense (P25)
      5. Occurring in Game Period (P8)
      6. Game Clock Display at Start (P34)
      7. Has Starting Yard Line (P13)
      8. Drive Result (P33)
      9. Length of Drive in Yards (P26)
      10. Length of Drive Elapsed Time (P27) (convert to seconds)
      11. Length of Drive in Number of Plays (P28)
   3. Play-related Properties
      1. Instance of (P17) (instance of Time Segment}
      2. Instance of (P17) (instance of American Football Play}
      3. Sequential Number of Play in Game (P19)
      4. Sequential Number of Play in Current Drive (P36)
      5. Has Point in Time (P9) - for now, just copy and paste "xxxx-xx-xx" portion of spreadsheet data from each BT cell in spreadsheet
         1. Qualify with Wall Clock Display at Start (P37) by copying the Txx:xx:xxZ" portion of the data from each BT cell in spreadsheet
      6. Home Team Score at Start of Play (P10)
      7. Away Team Score at Start of Play (P11)
      8. Team on Offense (P24)
      9. Team on Defense (P25)
      10. Occurring in Game Period (P8)
      11. Game Clock Display at Start (P34)
      12. Has Down Type (P15)
      13. Has Starting Yard Line (P13)
      14. Yards to go for First Down (P14)
      15. Textual Description of Play Outcome (P20)
      16. Type of Play (P16)
      17. Scoring Result (P6)