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: Mikasa Cheers Square Accent Plate, 8.5-Inch
Product description: The fun and whimsical designs of our Cheers collection set a festive mood at any gathering. Make a statement for a formal or casual setting in fun designs likes lines, dots, and swirls. Choose one design or mix and match for a colorful table. Your guests will be talking about your choice for a long time. This pattern coordinates with Cheers stemware. It is super strong and chip resistant, dishwasher safe, oven safe, freezer safe and microwave safe. Set of 4 square accent plates, each measures 8-1/2 inch square.
Product feature: The fun and whimsical designs of the Cheers Spiral collection set a festive mood at any gathering, This accent plate is great for salads, but can also be used for a sandwich and chips, dessert or a snack., Made from high quality bone china which is high-quality and chip resistance, This square accent plates measures 8-1/2 inch square, Dishwasher and microwave safe, 1 - Accent Plate, 8-1/2-Inch, Clay - Bone China, Contemporary design is stylish and sophisticated, Dishwasher and Microwave safe
Product brand: Mikasa
Target attributes: Size
Answer: attribute: size
value: 8-1/2 inch
source: product description
attribute: size
value: 8-1/2-inch
source: product feature
attribute: size
value: 8.5-inch
source: product title
attribute: size
value: 8-1/2 inch
source: product feature