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: uxcell Woman Cut Out Back Round Neck Sleeveless A Line Dress w Waist String
Product description: Color: Navy Blue, Beige Cut Out Back, Round Neck, Sleeveless, Pullover, Button Closure Back, Well-fitting, A Line Dress w Waist String Women A Line Dress w Waist String ONLY,other accessories photographed not included. Please check your messurements to make sure the item fits before ordering. Flat Size International Size US Size Bust Girth Waist Girth Hip Girth Arm Girth Shoulder Width Sleeve Length Total Length M 10 78cm/ 30 3/4 inches 70cm/ 27 1/2 inches #N/A #N/A 34cm/ 13 3/8 inches #N/A 82cm/ 32 1/4 inches
Product feature: International Size: M; US Size: M (US 10), 80% Polyester, 20% Cotton Blends, Cut Out Back, Round Neck, Sleeveless, Pullover, Button Closure Back, Well-fitting, A Line Dress w Waist String, See product description below for sizing information, ASIN: B00SRSKQPG, Item model number: a15011500ux0351, Date first listed on Amazon: January 26, 2015, Average Customer Review: Be the first to review this item
Product brand: uxcell
Target attributes: Neckline
Answer: attribute: neckline
value: round neck
source: product description
attribute: neckline
value: round neck
source: product feature
attribute: neckline
value: round neck
source: product title