This is the 2681st most frequent Dutch word.
martine
"Martine" is a proper noun in Dutch, typically used as a female given name.
In this sentence, 'Martine' is used as a proper noun, referring to a person whose name is Martine.
Martine gaat elke ochtend rennen in het park.
Martine goes running in the park every morning.
Here, 'Martine' is again a proper noun, this time indicating the author of the book.
Ik las een boek van Martine dat heel inspirerend was.
I read a book by Martine that was very inspiring.
This usage of 'Martine' functions as the subject of the sentence, fulfilling the role of a participant in the action.