premise: Much of what scientists know about Earth's internal structure and dynamics has been learned by studying earthquakes, since the waves that are generated by such cataclysmic rumblings change as they pass through various layers of the Earth's interior.
hypothesis: Studies of earthquake waves have helped scientists determine the structure of earth's interior.
hypothesis_graph_structure: Studies of earthquake waves<>have helped<>scientists determine the structure of earth's interior$$$scientists<>determine<>the structure of earth's interior