Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Toshiba Satellite A135-S2326 15.4" Laptop (Intel Celeron M Processor 520, 512 MB RAM, 80 GB Hard Drive, SuperMulti DVD Drive, Vista Basic)
Product description: TOSHIBA A135 S2326 15.4 In Satellite Notebook. The Satellite A135 Series is economically priced with technology you will value. Systems feature the latest in Intel processors for optimal performance. There is big memory for all your mp3s, work, picture and video files. All systems feature an 15.4 in diagonal WXGA TruBrite display adding the WOW factor to games and movies. Toshibas DVD SuperMulti optical drive reads and writes up to 11 formats, including DVD RAM which acts like an optical HDD. DVD RAM media required. High speed wireless LAN /802.11b/g/ lets you work cable free. No more searching for phone jacks, network cables, or plugging in special cards. Connect easily to networks in your home, office, and in wireless LAN hotspots at airports, hotels and coffee shops.
Product feature: 6-pound notebook with 15.4-inch screen and 1.6 GHz Intel Celeron M 520 processor (with Intel 64 architecture), 80 GB hard drive, 512 MB installed RAM (2 GB max), dual-layer DVD/CD burner, 54g Wi-Fi LAN (802.11b/g), 10/100 Ethernet, ATI Radeon XPress 200M video card (up to 128 MB shared), Connectivity: 4 USB, 1 VGA, 1 S-Video, 1 headphone, 1 microphone, 1 PCMCIA, Pre-installed with Windows Vista Home Basic
Product brand: Toshiba
Target attributes: Processor Brand
Answer: attribute: processor brand
value: celeron
source: product title
attribute: processor brand
value: celeron
source: product feature
attribute: processor brand
value: intel
source: product description