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: Clothink Women Black Organza Plaid Print Skater Elegant Long Maxi Dress
Product feature: Features: Organza Plaid Pattern, Double Layers, Outer lineing is semi-transparent, Design: Round neck ( Match the necklace is perfect ), Sleeveless, Side Zipper, Side Pockets, Occasions: Wedding dress or bridesmaid dress. Formal evening party dress, Style: Swing maxi black dress, Attention: We do not use the amazon's size chart, please check our size chart image, Shipping Information: View shipping rates and policies, ASIN: B019GF97J4, Item model number: C-DRES0615B044K, Date first listed on Amazon: December 16, 2015, Average Customer Review: 3.6 out of 5 stars 48 customer reviews
Product price: $25.99 - $29.99
Product brand: Clothink
Target attributes: Length
Answer: attribute: length
value: maxi
source: product feature
attribute: length
value: maxi dress
source: product title