{"knowledge_schema": {"broad_category": "Astronomy \u2192 Exoplanets \u2192 Density Calculations", "refinement": "This problem involves comparing the densities of different exoplanets based on their mass and volume, considering their composition.", "specific_scope": "The focus is on determining which of the given exoplanets has the highest density by calculating or estimating their densities based on their mass and size.", "goal": "Identify the exoplanet with the highest density among the provided options."}, "summary": "This problem requires understanding the concept of density, which is mass divided by volume. We need to compare the densities of four different exoplanets based on their mass and size. The options include planets with varying masses and compositions, and the goal is to determine which one has the highest density. By calculating the density for each option, we can identify the correct answer."}