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: Nike Baby Toddler Socks Blue, White, Aqua, 6 Pairs, Size 12-24 Months
Product description: Keep your babies tootsies warm this winter with these sporty swoosh logo socks from Nike. Made of a soft cotton blend construction and comes in a convenient 6 pack.
Product feature: 6 Pairs, Cotton Blend, Ribbed cuff for durability and keeping socks on, Nike Swoosh Logo, Imported, ASIN: B00HESF1YQ, Date first listed on Amazon: December 18, 2013, Average Customer Review: 3.0 out of 5 stars 1 customer review
Target attributes: Style
Answer: attribute: style
value: socks
source: product description
attribute: style
value: socks
source: product title
attribute: style
value: socks
source: product feature