Complex sentence: However, there is no hard evidence to verify the sarcophagus as the sarcophagus of Caecilia Metella as many historians believe the sarcophagus did not belong to the monument and had been found in the surrounding area of the mausoleum rather than inside it.
Split into simpler sentences: However, there is no definitive evidence to verify the sarcophagus as the sarcophagus of Caecilia Metella. Many historians believe the sarcophagus does not belong to the monument and had been found in the surrounding area of the mausoleum rather than inside it.