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: Stylemaster Home Products Stylemaster Corfu Sheer Jacquard Grommet Panel, 55 by 84-Inch, Copper
Product description: Style master Corfu is a sheer jacquard grommet panel. It hangs from stylish metal grommets with a stainless steel finish. The panels are wide width measuring 55" wide and 84" in length. Comes in 6 attractive colors. Easy care machine wash cold and tumble dry low.
Product feature: Fabric: 100% Polyester; Grommet: 100% Stainless Steel, Imported, 6 attractive colors: brass, copper, pearl, silver, titanium, white, Easy to care machine wash cold and tumble dry low, Imported from china
Product brand: Style Master
Target attributes: Light Allowance
Answer: attribute: light allowance
value: sheer
source: product title
attribute: light allowance
value: sheer
source: product description