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: HP ProLiant DL320e G8 687519-S01 1U Rack Server - 1 x Intel Xeon E3-1240V2 3.
Product description: The latest single processor (1P) rack server, the HP ProLiant DL320e Gen8 Server series is a new entry level rack-optimized platform ideal for single-application IT infrastructure, web and edge-of-network applications.
Product feature: Processor_Core - Quad-core 4 Core, Green_Compliant - Yes, Green_Compliance_Certificate/authority - WEEE, Memory_Card_Reader - Yes
Product price: $15.02
Product brand: HP
Target attributes: Number of Processors
Answer: attribute: number of processors
value: single processor
source: product description
attribute: number of processors
value: 1 x intel xeon
source: product title
attribute: number of processors
value: xeon e3
source: product title