Question: A list of potions used in the "Harry Potter" series, mentioned in potions class at Hogwarts, which is taught by Severus Snape in books one to five,  Severus Snape is a fictional character in which author's "Harry Potter" series?
Sentence (from "Severus Snape"): Severus Snape is a fictional character in J. K. Rowling's "Harry Potter" series.
Relevant evidence: Yes