I see:
1. That the field name ends with the hour of the time field
2. That there are 4 results required per hour
3. Perhaps that you want data only from the hours 13,19 & 21

I do not see how you choose which time fields to include - I can't find a pattern, be it in hours/minutes or in the missed out times. What is it that makes you want to pick those specific times from column B?