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

Input:
Product title: Vans Unisex Era Skate Shoe
Product description: Vans Men's Era Skate Shoe
Product feature: Canvas, Vans Vans classic low top lace-up skate shoe, Durable double-stitched canvas upper with padded tongue and lining, Vans signature waffle outsole, NOTE: D(M) sizing is for Men; for Women size, add up 1.5 to Men size., For example, 4 D(M) US is same as Women 5.5 (See "Size Chart" for Men-Women size conversion), Package Dimensions: 12 x 5 x 4 inches, Shipping Weight: 2 pounds ( View shipping rates and policies ), ASIN: B01K4F49LQ, Date first listed on Amazon: August 10, 2016, Average Customer Review: 4.1 out of 5 stars 28 customer reviews
Product price: $29.99 - $74.95
Product brand: Vans
Target attributes: Style
Answer: attribute: style
value: vans
source: product title
attribute: style
value: vans
source: product feature
attribute: style
value: vans
source: product description
attribute: style
value: vans
source: product brand