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: Fly Fishing Flies - DAVES CRICKET - Dry Fly (3-pack)
Product description: Daves Cricket is a great terrestrial pattern for trout that resembles both crickets and dark colored grasshoppers. During summer, be sure to cast this fly near the banks and overhanging foliage. Works great for bluegills and bass too!
Product feature: 3 Trout Flies, Guide-proven Pattern, Chemically Sharpened, High Carbon Steel Hooks, Hand-tied with Premium Materials such as Whiting Hackle, 100% Satisfaction Guaranteed, Limited Availability at this Price!
Product price: $2.75
Product brand: FlyDeal Fishing Flies
Target attributes: Variety
Answer: attribute: variety
value: flies
source: product brand
attribute: variety
value: fly
source: product description
attribute: variety
value: fly
source: product title
attribute: variety
value: flies
source: product feature
attribute: variety
value: fishing flies
source: product title