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: Toponechoice Women’s Vintage Retro 1950s Polka Dot Stripped High Waist Padded 2 Piece Bikini Swimsuit
Product description: Specifications: Material: 95% nylon 5% spandex Gender: Women Season: Spring, summer, autumn Pattern: polka dot/ stripped Waist: high waist Package Details: 1 x swimsuit set(1 top+ 1 bottom) Size: S:US0-2 Chest:30A 30B 32A(US CUP)--- Waist:21.0"-25.0"--- Hip:31.5"-33.1" Height: 410-51--- Weight: 88.2-99.2 lbs M:US4-6 Chest:32A 32B 34A(US CUP)--- Waist:23.6"-27.6"--- Hip:33.1"-34.6" Height: 412-53--- Weight: 99.2-110.2 lbs L:US8-10 Chest:32C 34A 34B 36A(US CUP)--- Waist:26.2"-30.2"--- Hip:34.6"-36.2" Height: 52-55--- Weight: 110.2-132.3 lbs XL:US12-14 Chest:34C 36A 36B 38A(US CUP)--- Waist:28.9"-32.8"--- Hip:36.2"-37.8" Height: 54-57--- Weight: 121.2-143.3 lbs
Product feature: 95% nylon 5% spandex, Imported, Elastic and soft material, comfortable to wear when you swim and have a sunbath at the beach, Adjustable straps and padding, great to wear it without underwear, Classic 1950s vintage polka dot halter with high waist bottom, Package Includes: 2 piece bathing suit(1 top+ 1 bottom), S:US Size 0-2. M:US Size 4-6. L:US Size 8-10. XL:US Size 12-14. (NOTE: the size is a little smaller than normal US size, please dont take reference to the size chart from Amazon but read the measurements in the product description and consider sizing up), Package Dimensions: 9.4 x 6.4 x 3 inches, Shipping Weight: 5.6 ounces, ASIN: B01GFMRHFW, Date first listed on Amazon: June 1, 2016, Average Customer Review: 3.0 out of 5 stars 4 customer reviews
Product brand: Toponechoice
Target attributes: Pattern
Answer: attribute: pattern
value: polka dot
source: product feature
attribute: pattern
value: polka dot
source: product title
attribute: pattern
value: polka dot
source: product description