TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: while it is a self-contained story , the book continues and develops many of the themes touched on in the first book.

SOLUTION: while it is a complete story , the book continues and develops many of the themes introduced in the first book.

PROBLEM: together they had 18 children , of whom 11 survived to adulthood.

SOLUTION: together , they had eighteen children , although only eleven lived to become adults.

PROBLEM: jacques rené chirac -lrb- born 29 november 1932 -rrb- served as the president of france from 17 may 1995 until 16 may 2007.

SOLUTION:
jacques rene chirac -lrb- born november 29 , 1932 -rrb- was the president of france from may 17 , 1995 to may 16 , 2007.