You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did central park open to the public?" whose answer is 1857.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did central park open to the public
Useful Output:

Doc 1: The period of original construction spanned the years between 1858 and 1873, with sections of the Park opened as they were completed. Encompassing some 843
Doc 2: When did Central Park open? The Park was initially opened in 1857. It was later improved and expanded according to Frederick Law Olmsted and
Doc 3: It was March 26, 1967, and more than 10,000 New Yorkers from Brooklyn to the Bronx gathered for a “Be In” on Easter Sunday to spread a message
Doc 4: The park opened in the winter of 1859 and immediately drew thousands of people to skate on the frozen lakes that were once swamps. In 1863 the
Doc 5: In the winter of 1859 the first part of the park opened to the public. Construction continued for many years, and the cost of building the park