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: adidas Tango Rosario Training Football - Size 5 - White/Black -
Product description: This football is built to fly on the pitch. Hand-stitched from high-quality materials, it features a latex bladder for rebound and is FIFA certified. Hand-stitched for high durability and good touch Latex bladder for best rebound characteristics Ball passed FIFA tests on circumference, weight, rebound and water absorption High quality and excellent durability; Training ball Requires inflation 100% polyurethane leather (imitation)
Product feature: adidas, Tango Rosario Training Football - Size 5 - White/Black
Product price: $58.99
Product brand: adidas
Target attributes: Size
Answer: attribute: size
value: size 5
source: product title
attribute: size
value: size 5
source: product feature