Add punctuation: A child is a man or a woman who has not attained full growth
A: A child is a man or a woman who has not attained full growth.

Add punctuation: Saturday 17 February 2018 61944912 requests since Tuesday 16 December 2003
A: Saturday 17 February, 2018 61944912 requests since Tuesday 16 December, 2003

Add punctuation: Everyone tried to keep the family together
A:
Everyone tried to keep the family together.