shokugeki no soma - When did Erina learn that Yukihira's father

It is a known fact that Yukihira Soma is the son of one of the world's most famous chefs, Yukihira Joichiro. When did Nakiri learn that Yukihira Soma's father was Joichiro? In which chapter?

What about Yukihira Soma's mother? - Anime & Manga Stack Exchange

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Food Wars! Shokugeki no Soma Season 3 Erina and Azami Finds Out Yukihira's Father

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Food Wars! Shokugeki no Soma Season 3 Erina and Azami Finds Out Yukihira's Father

Jōichirō Yukihira, Shokugeki no Soma Wiki