Complex sentence: The modern scholars have concluded that no such cardinal existed in 13th century because the suburbicarian see of Sabina was occupied by Bertrand de Saint-Martin from 1273 until 1277.
Split into simpler sentences: The modern scholars have concluded that no such cardinal existed in 13th century. The suburbicarian see of Sabina was occupied by Bertrand de Saint-Martin from 1273 until 1277.