Input (grade 13): The Dukes of Devonshire have been closely involved with Buxton since 1780, when the 5th Duke used the profits from his copper mines to develop the town as a spa in the style of Bath.
Output (grade 11): The Dukes of Devonshire have been helping Buxton since 1780, when the Duke used his money from his copper mines to develop the town as a spa like Bath.