Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: KoTing Home Fashion Modern Polyester Solid Brown Embossing Thermal Insulated Room Darkening Window Curtains Drapes Grommet Top,Set of 2 Panels,72 by 84-Inch Each Panel
Product description: KoTing is a much love sisters home fashion store. Adroit Vivian find all over the world every year,the selection of high-quality yarn and fabric.Design and use of fashion elegant and full of personality patterns. Strict Alisa using mature management methods,lead the first-class team to bring you these beutiful products. Product Feature Type:Custom Made Includes:2 Panels Style:Modern Fabric Type:Polyester Crafts:Embossed Care Instruction:Dry-Clean . Q&A Q:How can I make sure the size I select can fit my window? A:You can refer our How to Measure guide.The width you order should be 1.5-2 times larger than the dimension you measure.For example,if a dimension of 42Wx84L Inch,then you should choose 2 panels curtains,per curtain size is 42Wx84L. Q:How do I select other drapery heading or other size? A:After the purchase,you can send message to us,tell us your request,and note to check our reply messages.
Product feature: Polyester Fabric,shading Rate 85%, 3-6 days tailoring time,UPS Fast Delivery, Including 2 panels, Hand-made products,allowed size error range 3cm, The default is Grommet Top.We have 4 Top curtain options,If you select the other option must at the same time send messages to us, Need to customize other size,please contact us, We all items are for real shooting; For technology, display, light reasons may be a slight deviation, please in kind prevail
Product price: $79.99
Product brand: KoTing
Target attributes: Light Allowance
Answer: attribute: light allowance
value: room darkening
source: product title