{"messageId": "2343", "unrefinedText": "the twin paradox is a thought experiment in special relativity involving identical twins one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on earth has aged more"}
{"messageId": "2343", "refinedText": "The twin paradox is a thought experiment in special relativity involving identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more."}