{'declarativized': 'sound travels faster in saltwater than in freshwater because saltwater has a higher density than freshwater', 'correct': True, '__index_level_0__': 1987}
sound travels faster in saltwater than in freshwater because saltwater has a higher density than freshwater True 1987
{'declarativized': 'sound travels faster in saltwater than in freshwater because saltwater has a higher density than freshwater', 'correct': True, '__index_level_0__': 1987}