Input (grade 4): 1867 & ndash; Alaska is purchased from Russia for $7.2 million, about 2 cent\/acre ($4.19 \/O/ km), by United States Secretary of State William H. Seward.
Output (grade 4): 1867 - Alaska is purchased for $7.2 million, about 2 cent\/acre ($4.19 \/O/ km), by United States Secretary of State William H. Seward.