Original sentence: Contract 4 was signed between the City and the Municipal Railway Company, a subsidiary of the BRT</pre> (later BMT), formed especially for the purpose of contracting with the City for construction of the lines.Under the terms of Contracts 3 and 4, the City would build new subway and elevated lines, and rehabilitate and expand certain existing elevated lines, and lease them to the private companies for operation
Edited sentence: Contract 4 was signed between the City and the Municipal Railway Company, a subsidiary of the BRT</pre> (later BMT), formed especially for the purpose of contracting with the city for construction of the lines.Under the terms of Contracts 3 and 4, the city would build new subway and elevated lines, and rehabilitate and expand certain existing elevated lines, and lease them to the private companies for operation