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After a tentative creation of several smaller suburban cemeteries, the Prefect Nicholas Frochot under Napoleon Bonaparte provided a more definitive solution in the creation of three massive Parisian cemeteries outside the city limits. Open from 1804, these were the cemeteries of Père Lachaise, Montmartre, Montparnasse, and later Passy; these cemeteries became inner-city once again when Paris annexed all neighbouring communes to the inside of its much larger ring of suburban fortifications in 1860. New suburban cemeteries were created in the early 20th century: The largest of these are the Cimetière parisien de Saint-Ouen, the Cimetière parisien de Pantin (also known as Cimetière parisien de Pantin-Bobigny, the Cimetière parisien d'Ivry, and the Cimetière parisien de Bagneux).[citation needed] Some of the most famous people in the world are buried in Parisian cemeteries.

When were the 3 new cemeteries open?
Answer: 1804
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There are seven state parks within the confines of New York City, including Clay Pit Ponds State Park Preserve, a natural area which includes extensive riding trails, and Riverbank State Park, a 28-acre (110,000 m2) facility that rises 69 feet (21 m) over the Hudson River.

How large is Riverbank State Park in acres?
Answer: 28
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A state's consent may be invalidated if there was an erroneous understanding of a fact or situation at the time of conclusion, which formed the "essential basis" of the state's consent. Consent will not be invalidated if the misunderstanding was due to the state's own conduct, or if the truth should have been evident.

What on behalf of a state cannot invalidate that state's consent to a treaty?
Answer:
own conduct