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: MENS ARGYLE DRESS SOCKS COTTON BLEND 6 PAIRS SIZE 10-13 COTTON BLEND WITH SPANDEX
Product description: QUALITY DRESS SOCKS FOR MEN WITH ASSORTED COLORS. cOTTON BLEND SOCKS WITH SPANDEX FOR GREAT FIT AND STRETCH. COMFORTABLE AND CLASSY SOCKS FOR EVERYDAY, SPECIAL OCCASION OR PARTY WEAR.
Product feature: COTTON SPANDEX BLEND DRESS SOCKS, ARGYLE DRESS SOCKS, DIAMOND PATTERN, CLASSY AND MODERN SOCKS WITH GREAT COLOR SCHEMES, FITTING YET COMFORTABLE SOCKS. LONG LASTING, EXECUTIVE STYLES SOCKS, Package Dimensions: 10 x 7 x 2 inches, Shipping Weight: 12 ounces ( View shipping rates and policies ), ASIN: B018YIQBQG, Item model number: 382FD6P, Date first listed on Amazon: November 1, 2017, Average Customer Review: 5.0 out of 5 stars 1 customer review
Product price: $11.50
Product brand: Royal Classic
Target attributes: Pattern
Answer: attribute: pattern
value: argyle
source: product title
attribute: pattern
value: argyle
source: product feature