Complex sentence: Assyrian Neo-Aramaic is, to a significant degree, mutually intelligible with Chaldean Neo-Aramaic and is closely related to it, as both evolved from the same distinct Syriac language between the 5th century BC and 1st century AD.
Split into simpler sentences: Assyrian Neo-Aramaic is, to a significant degree, mutually intelligible with Chaldean Neo-Aramaic. It is closely related to Chaldean Neo-Aramaic, as both evolved from the same distinct Syriac language between the 5th century BC and 1st century AD.