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: Sigma 18-300mm F3.5-6.3 Contemporary DC Macro OS HSM Lens for Pentax
Product description: 18-300mm F3.5-6.3 DC Macro HSM ( C ) Pentax
Product feature: Maximum Aperture Range: f/3.5-6.3, Focal Length : 18-300 mm, Minimum focusing distance -39cm/15.3 inch, One SLD and Four FLD Elements, Super Multi-Layer Coating, Hyper Sonic Motor AF System, Optical Stabilization, Super compact high-ratio zoom lens, Customization and flexible adjustment with Sigma USB Dock, Renewed OS (Optical Stabilization) for better compensation, Sony and Pentax mounts will not have OS function, 72mm Filter Size
Product brand: Sigma
Target attributes: Type
Answer: attribute: type
value: zoom lens
source: product feature
attribute: type
value: 300mm
source: product title
attribute: type
value: 300mm
source: product description
attribute: type
value: 300 mm
source: product feature