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: Laney VC30-212 VC Series 30 Watt Class A Guitar Tube 2x12 Combo
Product description: The range of VC30 combos offer classic British class A tone in a variety of speaker options. The VC30 features 2 footswitchable channels, with three band EQ on the drive channel and a bright switch. If you're looking for that elusive living tone then look no further than the VC30. The VC30-112 houses 2 x 12" Custom designed 35 watt drivers. The VC30 generates very little cross over distortion because it runs in pure class A mode - its valves are always hot and ready to roll, which gives it that unmistakable class A sound and feel. If you've never experienced that level of connection between a player an amp and a tone then you've never tried a VC30. The VC30-212 is voiced through its premium ECC83 preamp tubes and generates 30 watts of power through premium EL84 output tubes. All this sound is run through two 12in Celestion Seventy 80 custom speakers to deliver the pure British tone Laney is known for. Laney - Power To The Music
Product feature: All Tube 30 Watt Class A Construction, 2x10in Jensen Speakers, 2 Channel Operation with Bright Switch, Footswichable Channel Switching and Reverb, Optional FS2 Footswitch Available
Product brand: Laney
Target attributes: Type
Answer: attribute: type
value: tube
source: product title
attribute: type
value: all tube
source: product feature
attribute: type
value: el84
source: product description
attribute: type
value: tubes
source: product description