Problem with subsetting of observations based on conditions R

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天涯浪人
天涯浪人 2020-12-16 00:33

I hope you can help me with subsetting

DATA 1

df2 <- structure(
  list(
    record_id = c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2         


        
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