Input (grade 13): February 3 - A chartered plane transporting musicians Buddy Holly, Ritchie Valens, Roger Peterson and The Big Bopper goes down in foggy conditions near Clear Lake, Iowa, killing all 4 occupants on board, including pilot Roger Peterson.
Output (grade 10): February 3 - American musicians, Buddy Holly, Richie Valens, and "The Big Bopper" are killed in a plane crash on their way to a concert.