Original sentence: While the Diplodocus carnegiei mounted at the Carnegie Museum of Natural History in Pittsburgh, United States actually exceeds it in length (27 m, or 90 ft), the Berlin specimen is taller, and far more massive
Edited sentence: While the Diplodocus carnegiei mounted next to it (a copy of an original from the Carnegie Museum of Natural History in Pittsburgh, United States) actually exceeds it in length (27 m, or 90 ft), the Berlin specimen is taller, and far more massive