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: SCHWALBE Big Apple trekking bike tyre Active, 26 x 2.15, Wire black
Product description: Brand: Schwalbe Intended use: Citry&Touring Wheel Size: 26 Inch Weight: 920 g Tyre: Tyre Size ETRTO (Width x Diameter): 55-559 mm Build: wired tyre balloon tyre Pressure Bar: 2 bar Pressure psi: 30 Profile: HS 430 Rubber Compound: SCHWALBE Basic Compound thicker woven carcass: 50 Reflective Stripe: yes Puncture Resistant: yes
Product feature: Brand: Schwalbe, Intended use: Citry&Touring, Wheel Size: 26Inch, Tyre-Build: wired tyre, Tyre-Build: balloon tyre
Product price: $33.71
Product brand: Schwalbe
Target attributes: Casing
Answer: attribute: casing
value: None
source: None