Task: Text Simplification
Input (English): references external links 121 hermione and s / 2002 -lrb- 121 -rrb- 1 , orbit data website maintained by f. marchis.
Output (English): mentioned of external links 121 hermione and s / 2002 -lrb- 121 -rrb- 1 , orbit data website was preserved by f. marchis.