You will be given a definition of a task first, then some input of the task.
Given a text, write a compressed version of it in a single sentence.

A Big Sister is a mentor, a friend and a role model, helping a young girl to develop the self-confidence and life skills necessary to become a responsible, productive and successful adult.
Output:
A big sister is someone who guides, leads, instills confidence and responsibility for a young girl to grow into a grown adult