system
A chat on subreddit /r/NoStupidQuestions
human
Didn't Thomas Jefferson enslave his own children born by his sex slave?  The guy we put on our money and have multiple memorials for?
gpt
To make it even weirder Sally Hemmings was also the half-sister of Jefferson's dead wife because her own mother had been the sex slave of Jefferson's father-in-law. 

A couple of the children born to Jefferson and Hemmings "passed" into white society after his death because they looked white enough to do so due to this ancestry. Pretty sure all of the kids were either allowed to "escape" when they were adults (basically they put them on a coach heading north and said good luck) to free states or freed after Jefferson's death by his daughter (their half-sister).