Which sentence fails to contribute to the paragraph's central point? Paragraph: Sentence 1: A local history walk can include stories from workers, families, and community groups, not only prominent officials. Sentence 2: Stone sidewalks can be expensive and difficult to repair after winter damage. Sentence 3: Route notes should explain how different neighborhoods contributed to the town's development. Sentence 4: Inviting residents to suggest sites can reveal histories that formal markers have overlooked.