Input (grade 13): However, it was now clear that the Republic of Maryland could not survive as an independent state, and 18 March 1857 Maryland was annexed by Liberia, becoming known henceforth as Maryland County.
Output (grade 12): However, it was now clear that the Republic of Maryland could not survive on its own, and 18 March 1857 Maryland was added by Liberia, and became known as Maryland County.