I want to know the answer to the following question:
In what year were Bois de Boulogne and Bois de Vincennes annexed?
All the background I'm provided with is that "In 1929, the Bois de Boulogne and Bois de Vincennes forest parks were officially annexed to the city, bringing its area to about 105 km2 (41 sq mi).". Is that enough to answer the question?