Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Lecimo Women's 50s 60s Vintage Rockabilly Swing Audrey Hepburn Cocktail Dress
Product description: Description: Comfortable to wear Vintage Sleeveless Swing Retro Party Cocktail Dress design Special Solid v-Neck design Great gifts for your friends and yourself Specifications: Material: Cotton Color: Black/Red Size: M/L/XL/2XL Size-----US------UK(AU)------EU-------------Bust-----------Waist---------Shoulder---------Length ----------------------------------------inch----cm------inch----cm-------inch---cm------inch----cm M--------4~6------6~8-------34~36-------33.86---86------25.98---66-------16.14--41------39.37---100 L-------8~10-----10~12------38~40-------35.83---91------27.95---71-------16.54--42------39.76---101 XL------12~14----14~16------42~44-------37.80---96------29.92---76-------16.93--43------40.16---102 2XL-----16~18----18~20------46~48-------39.76---101-----31.89---81-------17.32--44------40.55---103 Please check the size before purchasing! Package included: 1x Women dress Note: 1.Due to the manual measurement and different measurement methods, please allow 2-3cm deviation. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different.
Product feature: Vintage Sleeveless Swing Retro Party Cocktail Dress design, Special Solid v-Neck design, Material: Cotton + Polester + Spandex, Suitable for many occasions like party casual picnic and so on., Classic and Iconic style that will never be out of fashion, Shipping Information: View shipping rates and policies, ASIN: B01DVGAMUM, Date first listed on Amazon: April 5, 2016, Average Customer Review: 3.9 out of 5 stars 4 customer reviews
Product price: $35.99
Product brand: Lecimo
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: sleeveless
source: product feature
attribute: sleeve style
value: sleeveless
source: product description