{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves the reaction of an organic compound with hydrogen bromide, focusing on the identification of products formed from the reaction.", "specific_scope": "The context is a specific reaction where a substituted benzene compound is treated with hydrogen bromide, leading to the formation of new products that can be analyzed using thin-layer chromatography (TLC).", "goal": "Identify the possible structures of the products formed from the reaction based on the observed changes in the TLC results."}, "summary": "In this organic chemistry problem, a researcher reacts a substituted benzene compound with hydrogen bromide and monitors the reaction progress using TLC. The disappearance of the reactant and the appearance of two new spots indicate the formation of products. The task is to determine which of the provided candidate structures could correspond to the products formed in the reaction. The correct answer involves identifying the structures that align with the expected outcomes of the reaction mechanism."}