original passage: Ultimately it has been determined that his death was likely the result of the combination of his multiple weakening disorders, a leg fracture, perhaps as the result of a fall, and a severe malarial infection. The placement of the mummy's embalming incision is unique. This, combined with the two levels of resin inside his skull, have led to suggestions that an initial mummification was carried out by an inexperienced embalmer.
original sentence: This, combined with the two levels of resin inside his skull, have led to suggestions that an initial mummification was carried out by an inexperienced embalmer.
sentence2: Is the presence of two layers of resin inside the skull most likely explained by the fact that a more competent embalmer later finished preserving this body?
sentence1: Ultimately it has been determined that his death was likely the result of the combination of his multiple weakening disorders, a leg fracture, perhaps as the result of a fall, and a severe malarial infection. The placement of the mummy's embalming incision is unique. This, combined with the two levels of resin inside his skull, have led to suggestions that an initial mummification was carried out by an inexperienced embalmer who nonetheless revolutionized the trade