sentence: 80 - 20 BC , wrote forty books of world history and in the translated version by Oldfather ( 1939 ) , Siculus provided early documents about purifying water , such as through boiling and sand filtration , dating all the way back to 2000 BC in ancient Greece .
modified: 80 - 20 BC , wrote forty books of world history and in the translated version by Oldfather ( 1939 ) , Siculus provided early documents of purifying water such as boiling and sand filtration , dating all the way back to 2000 BC in ancient Greek .
transformation: PREP, PUNCT, PREP, NOUN