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: "where did immigrants enter new york before ellis island?" whose answer is Castle Clinton.
Each document should contain about 30 words, and these documents should contain useful information.

Query: main points of entry for immigrants to new york before ellis island
Useful Output:

Doc 1: In 1907, no passports or visas were needed to enter the United States through Ellis Island. In fact, no papers were required at all.
Doc 2: Before Ellis Island opened, immigrants were required to be processed by the State, not the federal government. Castle Garden (originally and
Doc 3: What Were the Major U.S. Immigration Ports? · New York: Castle Garden, New York's first official immigration station, was established in 1855.
Doc 4: The Port of New York in New York City was the only official seaport of entry into New York State; not until 1895 were locations along the northern land border.
Doc 5: The Castle Garden Emigrant Landing Depot was the first USA immigration station. In the 1850s, New York City and state officials pooled their