system
A chat on subreddit /r/me_irl
human
It is truly not hard to find people on the internet. I had to track a dude down once for reason, 5 minutes and I had his parents names and address, his address, all their phone numbers, his job, if you get creative you can pull a lot of information.
gpt
All I need is general vicinity and first name and I will hunt anytime my friends are interested in someone because they tend to have poor judgement in partners lol