{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reactions and Mechanisms", "refinement": "This problem focuses on the Michael addition reaction, which involves the nucleophilic attack of an enolate on an \u03b1,\u03b2-unsaturated carbonyl compound.", "specific_scope": "The task is to identify the reactants and major products of specific Michael addition reactions involving given organic compounds and conditions.", "goal": "Determine the correct products formed from the specified reactants in the Michael addition reactions."}, "summary": "This problem involves understanding the Michael addition reaction, where nucleophiles attack \u03b1,\u03b2-unsaturated carbonyl compounds. The task is to identify the major products formed from the given reactants in three separate reactions. The correct answers indicate the final products of these reactions, which include trimethyl 2-(p-tolyl)propane-1,1,3-tricarboxylate for reaction A, 3-(2-oxocyclohexyl)butanenitrile for reaction B, and cyclohexane-1,3-dione for reaction C."}