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

Input:
Product title: 50 nespresso capsules mixed flavors New
Product description: 50 MIXED NESPRESSO
Product feature: 10 NESPRESSO VIVALTO LUNGO, 10 NESPRESSO COSI, 10 NESPRESSO DHJANA, 10 NESPRESSO ARPEGGIO, 10 NESPRESSO VOLLUTO
Product brand: Nestle Nespresso
Target attributes: Roast
Answer: attribute: roast
value: None
source: None