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: Acting Pro Women's Sleeveless Swing Dress (S-3XL)
Product description: Print, sleeveless short dress in a relaxed style with a scoop neck and pleated detailing
Product feature: 95% Rayon 5% Spandex, Made in USA, Machine Wash Cold Separately, Made in USA, 95% Rayon 5% Spandex, Women's American Flag Dress, Women's Sleeveless Swing Dress, Machine wash; tumble dry, Shipping Information: View shipping rates and policies, ASIN: B01G7SPR3I, Date first listed on Amazon: May 26, 2016, Average Customer Review: 4.7 out of 5 stars 6 customer reviews
Product price: $11.99 - $14.49
Product brand: Acting Pro
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: sleeveless
source: product feature
attribute: sleeve style
value: sleeveless
source: product title
attribute: sleeve style
value: sleeveless
source: product description