id: Unique Case Identifier
v1: Overall, I'm satisfied with supermarket x
v2: I'd recommend supermarket x to other people
v10: Supermarket x has a good range of product
v11: Supermarket x has low pricing
v12_1: The employees of supermarket x are knowledgeable
v12_2: The employees of supermarket x are friendly
v13_1A: Supermarket x is usually tidy and clean