Suppose J.K. Rowling is a British author best known for writing the Harry Potter series. The books have been translated into over 80 languages and sold over 500 million copies worldwide. Rowling has also written other novels, including "The Casual Vacancy" and the Cormoran Strike series under the pseudonym Robert Galbraith.
Can we infer that "Rowling has only written one series of books."? Yes, no, or maybe?