keep dark in a sentence

1. In the spring, Woolite introduced Woolite Dark Laundry, to " keep dark clothes looking like new ."
2. Osama bin Laden, meanwhile, has succeeded in highlighting an issue that the country's rulers have preferred to keep dark : the presence of American forces in the kingdom.
3. He recognises Aiolia's potential early on, but prefers not to make any kind of judgement on his still maturing character . and risks his life to keep Dark Lightning Koios at bay that the two start to become friends.
4. Then the action picks up where " Two Towers " left off, with Gollum plotting to regain his precious as Frodo and Sam trek toward Mount Doom, where they must destroy the ring to keep dark lord Sauron from enslaving Middle-earth.
5. It's difficult to find keep dark in a sentence.