Of all addresses in the Terra Blockchain that delegated in Q1 2021, how many active on June 30th?

This dashboard aims to answer the question: Of all addresses that delegated (Luna) in Q1 2021, how many were active on June 30th 2021? To answer this main question we would need to understand the following: 1. How many unique addresses delegated LUNA in Q1 2021 (defined as 1st Jan 2021 to 31st March 2021)? 2. What is a fair definition of "Activity" in the Terra ecosystem on 30th June? 3. Based on #1 and #2, how many unique addresses that delegated LUNA in Q1 2021 were active on 30th June 2021.