Sylvie is most likely the alias of a lass named Patty Patchrint. She and her boyfriend (the lad who called and threatened to kill me) run the Grant Foundation Center, pitching themselves to government agencies as trainers. The two live in L.A., not far from the Hacienda Heights hangout of Suvadepa (spelling?) Patchrint, who at 58 is probably Patty's proud pappa.
They then hire a schmuck (that could be you!) a week ahead of time and throw him/her/it into the classroom. Mass student dissatisfaction ensues over matters like lacking coursebooks. Its all very South Korea-i. By the time the students vented on the aforementioned schmuck, Patty and her loverboy are off to the next town. The grant foundation center used to be called the ICI- institute on communications something something.
They either pitch themselves to government agencies as people who know all about getting stimulus moolah: or at least they say they pitch themselves to government agencies. Its possible that no government body has ever heard of them.