sentence2_structure: Studies of earthquake waves<>have helped<>scientists determine the structure of earth's interior$$$scientists<>determine<>the structure of earth's interior
sentence1: And, by recording those earthquakes and the different paths that they take through the earth and how they travel, we're going to be able to determine in a much higher resolution the structure of the earth's interior.
sentence2: Studies of earthquake waves have helped scientists determine the structure of earth's interior.
question: Studies of earthquake waves have helped scientists determine the