Simplify the following text for a Grade 6 native English-speaking person.
Original: They also encounter a French woman named Danielle Rousseau who was shipwrecked on the island just over 16 years earlier , and they find a mysterious metal hatch buried in the ground .
Simplified: They also meet a Frenchwoman who has been on the island for 16 years and find a metal hatch ( door ) buried in the ground .