Suppose J.K. Rowling is a British author best known for writing the Harry Potter fantasy series. The books have gained worldwide attention, won multiple awards, and sold more than 500 million copies, becoming the best-selling book series in history. Rowling has also written crime fiction under the pen name Robert Galbraith.
Can we infer that "J.K. Rowling has only written one book series"? Yes, no, or maybe?