In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
One example: The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Solution is here: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Explanation: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

Now, solve this: If its parents are each two inches taller than the averages for men and women , on average , the child will be shorter than its parents by some factor times two inches .
Solution:
If its parents are each two inches taller than the averages for men and women , then , on average , the offspring will be shorter than its parents by some factor ( which , today , we would call one minus the regression coefficient ) times two inches .