Suppose J.K. Rowling wrote the Harry Potter series, which consists of seven books following the life of a young wizard, Harry Potter, and his friends at Hogwarts School of Witchcraft and Wizardry. The series has sold over 500 million copies worldwide and has been adapted into a successful film franchise.
Can we infer that "J.K. Rowling is the first author to sell over 1 billion copies of her books."? Yes, no, or maybe?