Take the following as truth: In the grand old lighthouse (and second prison), the Tour de la Lanterne, you will find prisoners' graffiti on the walls as you climb up to the balcony for a view over the city and the bay.
Then the following statement: "There is prisoners' graffiti all along the walls of the Tour de la Lanterne, an old lighthouse in the city." is true, false, or inconclusive?
Answer: True