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: "One of the proposers of the first railroad built in the state of New York surveyed portions of what land for the US government?" whose answer is the Louisiana Purchase.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who proposed the first railroad built in the state of new york
Useful Output:

Doc 1: The railroad system built by New York Central and its predecessors linking New York City, Buffalo, Cleveland and Chicago are still very important freight and
Doc 2: The train was operated by the Mohawk & Hudson Railroad, organized in 1826 as the first railroad in New York and one of the first in the country.
Doc 3: Famous railroad baron Cornelius Vanderbilt purchased this line in 1864 and set his sights on a connection with the growing New York Central.
Doc 4: 1826 The Mohawk & Hudson Railroad is chartered in New York State. Most historians consider this the first event leading to the New York Central
Doc 5: It was Charles T. Harvey who managed to surmount such obstacles to design and build the world's first elevated street railroad on Manhattan's