{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Stereochemistry", "refinement": "This problem focuses on the concept of optical activity, which is determined by the presence of chiral centers in organic compounds.", "specific_scope": "The task involves analyzing a list of organic compounds to identify which ones are chiral and thus capable of exhibiting optical activity.", "goal": "Determine the number of compounds from the provided list that exhibit optical activity."}, "summary": "This problem requires understanding the concept of optical activity in organic chemistry, specifically identifying chiral compounds. A compound exhibits optical activity if it has at least one chiral center, meaning it cannot be superimposed on its mirror image. By analyzing the provided compounds for chiral centers, we can determine how many of them are optically active. The goal is to count the number of optically active compounds from the list."}