[{"Bold_text": "adverb", "List Items": ["apart or aside from the main subject of attention, discussion, etc.; by the way; parenthetically :Incidentally, while you were waiting for the officer to run your registration through the system, did you notice if the post office was open?", "in the course of something else, and not intentionally:The bone fractures were discovered only incidentally, during an unrelated CT scan of her chest."]}]