Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Prejudices: A Selection (Maryland Paperback Bookshelf)
Product description: In the 1920s, when he was at the peak of his form, H. L. Mencken would periodically collect his magazine work and publish his favorite pieces in a series of books entitled Prejudices . This collection represents the best of those books. The essays were selected and introduced by novelist James T. Farrell . Prejudices: A Selection first appeared nearly 40 years ago and is now being published by Johns Hopkins University Press, which is thankfully bringing much of Mencken's work back into print. Included are such gems as Mencken's attack on the South in "The Sahara of the Bozart"; his amazingly prescient appreciation of Ring Lardner; and more than two dozen other essays which show convincingly why Mencken was one of the most popular, most feared, and among fools, the most hated writers of his day., Born in Baltimore in 1880, H. L. Mencken remained a lifelong resident and became one of the city's most famous sons. Ever home to controversy, his column for the Baltimore Sun earned him a national reputation. He died in his rowhouse on Union Square in 1956.
Product price: $19.98
Product brand: Visit Amazon's H. L. Mencken Page
Target attributes: Format
Answer: attribute: format
value: paperback
source: product title