Talk to Alejandro on his farm west of Heidel. Requires 200 Amity and 5-8 energy (forgot how much).

C'est 3 points d’énergie.

as of 7/13/2023 its 5 energy to get the knowledge.

I used: Martina Finto > Daphne DelLucci > Vongole > Camellia Loggia > Emma Bartali > Sterie > Novara > Darifu