I hope we can equally concur this sentence is Incorrect mainly because "great" is surely an adjective, and can't be the topic of "is". The same is accurate once you place "the best" in that place. It is easy to argue that "the best" may be accurate as the topic https://24by7directory.com/listings13269482/top-latest-five-best-diet-plan-for-weight-loss-in-monmouth-county-nj-urban-news