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First provide a summary of the paper, and then address the following criteria: Quality, clarity, originality and significance. The paper presents a simple novel model for structured sparsity in spike-and-slab models and an expectation propagation algorithm for Bayesian inference. It is written clearly and accompanied by interesting examples and comparisons with other approaches. Q2: Please summarize your review in 1-2 sentences Although there are some previous works in this area, this particular approach is simple and novel. First provide a summary of the paper, and then address the following criteria: Quality, clarity, originality and significance.