Task: Sentence Expansion
Input (English): From the Middle Jurassic of Argentina , it was one of the earliest large South American theropods .
Output (English): It was among the earliest large South American theropods , having been found in Middle Jurassic strata of the Can ̃ ado ́ n Asfalto Formation in the Can ̃ ado ́ n Asfalto Basin of Argentina .