Task: Sentence Expansion
Input (English): In August 1963 , King spoke of President Lincoln and his well-known words : " Five score years ago , a great American , in whose symbolic shadow we stand today , signed the Emancipation Proclamation .
Output (English): Standing on the steps of the Lincoln Memorial in August 1963 , King began with a reference , by the style of his opening phrase , to President Lincoln and his enduring words : " Five score years ago , a great American , in whose symbolic shadow we stand today , signed the Emancipation Proclamation .