Input (grade 13): The ten-month investigation of the Warren Commission of 1963 â "1964 concluded that the President was assassinated by Lee Harvey Oswald acting alone and that Jack Ruby acted alone when he killed Oswald before he could stand trial.
Output (grade 11): A ten-month investigation into what happened was done by the Warren Commission in 1963 â "1964. The commission concluded that the President was assassinated by Lee Harvey Oswald.