QUESTION: Fix punctuation: Martinus introduces among other things new words and concepts
ANS: Martinus introduces, among other things, new words and concepts.

QUESTION: Fix punctuation: If we say that we have no sin we deceive ourselves and the truth is not in us
ANS: If we say that we have no sin, we deceive ourselves, and the truth is not in us.

QUESTION: Fix punctuation: Looking which airport for Bevagna
ANS: Looking which airport for Bevagna?

QUESTION: Fix punctuation: This Association says to protect the ethnic culture of the Valley Although its inhabitants do not have as clear or they see hard by the existence of this Association claro
ANS:
This Association says to protect the ethnic culture of the Valley, Although its inhabitants do not have as clear, or they see hard by the existence of this Association, claro.