21.   Thompkins says she decided to undergo surgery after researching the subject on the Internet and convincing herself that the surgery was safe.

22.   Though he obviously has invested a great deal of time researching his subject, Lynch at times loses the reader with dense writing.

23.   To get it, the Sorensons spent long hours at a public library researching the subject.

24.   Thus, while researching the subject of coach-athlete abuse for a book, Nelson began to wonder whether forgiveness might be possible.

25.   I go to the library and research a subject.