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: Top Chef 5-Piece Stainless Steel Knife Set, Portable
Product description: This officially licensed five-piece knife set will have you cutting like the pros. Like those used on Bravo's top-rated Top Chef program, these knives feature an ice-tempered stainless steel blade with precision cut sharpened cutting edge, hollow ground to reduce sticking and a full steel handle with seamless bonded and polished bolsters. Includes carrying case. Product Features: Ice-Tempered x30cr13 Stainless Steel Blades with Precision Sharpened Cutting Edge Hollow Ground to Reduce Sticking Full Steel Handle with Seamless Bonded and Polished Bolsters and Non-Slip Surface Laser Etched "Top Chef" Logo on Each Knife 7 inch Santoku Knife: Blade Length: 7 inches Handle Length: 4.8 inches Overall Dimensions: 11.8 x .6 x 1.85 inches 5 inch Satoku Knife: Blade Length: 5 inches Handle Length: 4.5 inches Overall Dimensions: 9.5 x .4 x 1.18 inches 3.5 inch Paring Knife: Blade Length: 3.5 inches Handle Length: 4.2 inches Overall Dimensions: 7.7 x .4 x .8 inches Sharpening Rod: Sharpener Length: 8 inches Handle Length: 5 inches Overall Dimensions: 13 x .6 x 1.18 inches Nylon Carry Pouch Dimensions: 15.5 x 1.4 x 7.5 inches.
Product feature: 7 Inch Santoku Knife: Blade Length: 7 inches Handle Length: 4.8 inches Overall Dimensions: 11.8 x .6 x 1.85 inches, 5 Inch Satoku Knife: Blade Length: 5 inches Handle Length: 4.5 inches Overall Dimensions: 9.5 x .4 x 1.18 inches, 3.5 Inch Paring Knife: Blade Length: 3.5 inches Handle Length: 4.2 inches Overall Dimensions: 7.7 x .4 x .8 inches, Sharpening Rod: Sharpener Length: 8 inches Handle Length: 5 inches Overall Dimensions: 13 x .6 x 1.18 inches, Nylon Carry Pouch Dimensions: 15.5 x 1.4 x 7.5 inches
Product price: $63.59
Product brand: Topchef
Target attributes: Set Size
Answer: attribute: set size
value: 5-piece
source: product title
attribute: set size
value: five-piece
source: product description