[nitpick] Consider adding a brief comment or extracting a named constant to explain why 'newID' is divided by 1000 to generate a unique numeric 'personID' for duplicate appearances.

[smasongarrison]

          [nitpick] Consider adding a brief comment or extracting a named constant to explain why 'newID' is divided by 1000 to generate a unique numeric 'personID' for duplicate appearances.

        .data$personID + .data$newID / ID_DIVISOR, # numeric, unique

Originally posted by @Copilot in #3 (comment)