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 Uefa Champions League Finale Lisbon Match Ball Size 5
Product description: The same as the official match ball used in European soccer's ultimate showdown, this soccer ball is made with high-end materials in the cover, backing and bladder for superb play on the pitch. Features a seamless surface for accurate flight and is FIFA certified. In the signature star pattern that has become an icon of the UEFA Champions League, this is the official match ball of the 2014 finale. Designed for soccer's elite, the Finale Lisbon is constructed to withstand and perform at the highest levels of the game. This is the ball that will be used in the 2014 finale at the Estadio da Luz in Lisbon, Portugal on May 24th. In addition to the star panel design, the ball features the official UEFA Champions League logo throughout and a trophy graphic.
Product feature: Official match ball of the UEFA Champions Leagus 2014 Finals in Lisbon, High-end materials in cover, backing and bladder for perfect on-field performance, Thermally bonded seamless surface for a more predictable trajectory, better touch and lower water uptake, Ball passed FIFA tests on circumference, weight, rebound and water absorption
Product brand: adidas
Target attributes: Size
Answer: attribute: size
value: size 5
source: product title