original: The Hainich has become the 13th national park of Germany in 1997.
simplifications: The Hainich is 13th national park in Germany since 1997. The Hainich became the 13th national park of Germany. The 13th national park in Germany is The Hainich. The Hainich is the 13th national park of Germany. It became a national park in 1997. The Hainich became Germany's 13th national park in 1997. The Hainich became Germany's 13th national park in 1997. The Hainich is the the 13th national park of Germany in 1997. The Hainich became a German national park in 1997. he Hainich became the 13th national park of Germany in 1997. In 1997, The Hainich became the 13th national park in Germany.