Complex sentence: The Guardian also publicized the discovery of a cache of 25 ink tablets found earlier in the 2017 season that were discovered in a trench in one of the earliest layers of the fort, dating to the 1st century AD.
Split into simpler sentences: The Guardian also publicized the discovery of a cache of 25 ink tablets found earlier in the 2017 season. The tablets were discovered in a trench in one of the earliest layers of the fort, dating to the 1st century AD.