Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Chic Off Shoulder Blouson Drop Waist Fitted Hem Casual Evening Maxi Long Dress
Product feature: Reveal your edgy side as you strut on this gorgeous sleek., This off shoulder dress has a kimono blouson style with drop waist fitting hem maxi dress., High quality fabrics keep you cool and comfortable all night!, Item #2340D measures from shoulder to hem in Small: L55 BFree W34, Medium: L56 BFree W35, Large: L57 BFree W36., This dress can turn everyones attention on you as you grace that club! Wear to cocktail parties, date night, and more!", Shipping Weight: 12 ounces, ASIN: B00DQCCD7M, Item model number: 2340D BLACK L, Date first listed on Amazon: July 1, 2013, Average Customer Review: 4.0 out of 5 stars 7 customer reviews
Target attributes: Shoulder Style
Answer: attribute: shoulder style
value: off shoulder
source: product title
attribute: shoulder style
value: off shoulder
source: product feature