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: Gorgeous Home 2 PANELS SOLID PURE WHITE (#72) SIZE 37" WIDE X 84" LONG THERMAL FOAM LINED BLACKOUT ROOM DARKENING BRONZE ANTIQUE GROMMETS HEAVY THICK PANELS PRIVACY WINDOW CURTAIN TREATMENT
Product description: YOU WILL RECEIVE 2 PANELS PER PURCHASE SIZE:37" wide x 84" length each panel Total (74"x 84") both panels THIS PANELS ARE THE PERFECT LOOK FOR ANY ROOM IN YOUR HOME *REDUCES WINDOW RELATED ENERGY LOSS *REDUCE HOME HEATING & COOLING COSTS *REDUCES GLARE NEAR YOUR COMPUTER *REDUCES SUNLIGHT FADING OR DAMAGING YOUR FURNITURE *ROOM DARKENING *REDUCE OUTSIDE NOISE LINED BACK 100 % PRIVACY CURTAIN BLOCK UP TO 80 % OF THE LIGHT HEAVY THICK PANELS PERFECT FOR ANY SEASON THE BEST QUALITY *SILVER GROMMETS ROD SIZE : 2" OR LESS FITS CARE INSTRUCTIONS: -MACHINE WASH IN COLD WATER -DO NOT BLEACH -TUMBLE DRY LOW -WARM IRON AS DESIRED
Product feature: 2 Thermal Panels Included. Each Panel is 37"W x 84"L so Both Panels Together are 74"W x 84"L, Provides Great Privacy and also Helps insulate against heat and cold Energy Efficient/Light Filtering/Noise Reducing, These Room darkening Blackout Curtains Has White Foam Backing to Block about up to 80% of Light compared to ordinary curtains, MASHINE WASH COLD TUMBLE DRY LOW
Product brand: Gorgeous Home LINEN
Target attributes: Light Allowance
Answer: attribute: light allowance
value: blackout
source: product feature
attribute: light allowance
value: room darkening
source: product feature
attribute: light allowance
value: room darkening
source: product title
attribute: light allowance
value: room darkening
source: product description