Complex sentence: Carl Friedrich Keil (1807-1888) was a conservative Lutheran Old Testament commentator, most known for his contributions to the Keil & Delitzsch commentaries written together with Franz Delitsch.
Split into simpler sentences: Carl Friedrich Keil (1807-1888) was a conservative Lutheran Old Testament commentator. He is best mknown for his contributions to the Keil & Delitzsch commentaries, written with Franz Delitsch.