Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Riveroy Women's Deep V-Neck Split Long Sleeve Party Maxi Dress With Belt
Product description: Material: Polyester & Spandex Collar: Deep V-Neck Sleeve: Long Sleeve. Dress Length: Floor Length. Color: Black,Dark Green Size: S(US 4-6).M(US 6-8).L(US 8-10).XL(US 10-12) Garment Care: Hand-wash and Machine washable. Note: Our size is not standard US Size.Please check our size as below carefully before you order. If you are not sure about your size,we suggest you choose one size up. This size information is just for reference only,and allow 1-3cm differences due do manual measurement,thanks. It may be a little chromatic aberration because of different computers, hope you understand. Size S (US 4-6. Bust 78cm. Waist 66cm. Length 134cm) Size M (US 6-8. Bust 82cm. Waist 70cm. Length 135cm) Size L (US 8-10. Bust 86cm. Waist 74cm. Length 136cm) Size XL (US 10-12. Bust 90cm. Waist 78cm. Length 137cm)
Product feature: Imported, Occasion: Suitable for Outdoor, party, night club, cocktail, Casual, Special Occaion., Size S (US 4-6. Bust 78cm. Waist 66cm. Length 134cm), Size M (US 6-8. Bust 82cm. Waist 70cm. Length 135cm), Size L (US 8-10. Bust 86cm. Waist 74cm. Length 136cm), Size XL (US 10-12. Bust 90cm. Waist 78cm. Length 137cm), Shipping Information: View shipping rates and policies, ASIN: B01DNMZGKK, Item model number: RL-301422, Date first listed on Amazon: March 31, 2016, Average Customer Review: 3.6 out of 5 stars 2 customer reviews
Product brand: Riveroy
Target attributes: Length
Answer: attribute: length
value: maxi dress
source: product title
attribute: length
value: floor length
source: product description