给定一组英文文章，提取其中的人名实体。

一篇英文文章，如“J.K. Rowling is the author of Harry Potter. Harry Potter was adapted into successful movies starring Daniel Radcliffe as Harry Potter. J.K. Rowling's other works include The Casual Vacancy and The Cuckoo's Calling.”
人名实体包括 J.K. Rowling, Daniel Radcliffe.