{"knowledge_schema": {"broad_category": "Astronomy \u2192 Exoplanetary Systems \u2192 Planet Mass Estimation", "refinement": "This problem involves calculating the mass of exoplanets based on their orbital characteristics and radial velocity measurements.", "specific_scope": "The focus is on comparing the masses of two planets in different exoplanetary systems using their respective orbital periods and radial velocity amplitudes.", "goal": "Determine the ratio of the mass of the planet in system_A to the mass of the planet in system_B."}, "summary": "This problem pertains to astronomy, specifically the estimation of exoplanet masses based on their orbital dynamics. It involves comparing two exoplanetary systems, where the mass of each planet can be inferred from its orbital period and radial velocity amplitude. The goal is to calculate the factor by which the mass of the planet in system_A is greater than that in system_B, leading to the conclusion that the mass ratio is 0.75."}