Detailed Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: The officers of arms earn money from their own private practices in heraldry and genealogy .
A:
In addition to their official duties , the heralds have for many centuries undertaken private practice in heraldry and genealogy , for which professional fees are charged .