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: Anchor Hocking TrueSeal Glass Food Storage Containers with Lids, Green, 11 Cup (Set of 2)
Product description: Glass dishes and lids nest and stack for ease of storing and space saving. Glass is microwave, pre-heated oven, refrigerator, freezer, and dishwasher safe. Lids are BPA-free and top-rack dishwasher safe
Product feature: Set Contains: (2) 11 Cup Rectangular Food Storage Containers with Green TrueSeal Lids, Features Tempered Tough Glass that Microwave, Oven, Freezer, & Dishwasher Safe, Glass does Not Stain or Absorb Odors, Our TrueSeal Lids are designed to prevent spills and leaks, Features 5 year warranty-Backed by our company, NOTE : The product size is 11
Product brand: Anchor Hocking
Target attributes: Material
Answer: attribute: material
value: glass
source: product title
attribute: material
value: glass
source: product feature
attribute: material
value: glass
source: product description