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: Gildan Tie-Dyes 54 Adult Spiral Tank Top
Product description: Hand-dyed with superior color-fast dyes, this multi-color Spiral tank top is colorful enough to stand out in any crowd, preshrunk 100% cotton, 6 oz., banded neck and armholes, double-needle bottom hem, Sizes: S-3XL.
Product feature: 100% Cotton, preshrunk 100% cotton, banded neck and armholes, double-needle bottom hem, 6 oz., Shipping Weight: 6.7 ounces ( View shipping rates and policies ), ASIN: B00YHNBS4S, Item model number: 54, Date first listed on Amazon: April 2, 2015, Average Customer Review: 3.5 out of 5 stars 11 customer reviews
Product price: $11.21 - $13.44
Product brand: Dyenomite
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: tank top
source: product description
attribute: sleeve style
value: tank top
source: product title