Original sentence: " The question is left unanswered.To stay alive, they share "purple berries", as a result of which they "haven't got sick once"
Edited sentence: " Since the question has no real meaning in the circumstances or even at all, it is left unanswered.To stay alive, they share "purple berries", as a result of which they "haven't got sick once" (iodine pills, which protect against radioactive iodine-131 in nuclear fallout)