Input (grade 4): March 30 & ndash; Alaska is purchased for $7.2 million from Alexander II of Russia, about 2 cent\/acre ($4.19 \/O/ km), by United States Secretary of State William H. Seward.
Output (grade 5): March 30 - Alaska is purchased for $7.2 million from Alexander II of Russia, about 2 cent\/acre ($4.19 \/O/ km), by United States Secretary of State William H. Seward.