Which Peanuts character, introduced in 1959, is Charlie Brown's younger sister?

Which U.S. president died on August 2, 1923, in San Francisco? On August 21, 1968, which nation was invaded by the Soviet Union and other Warsaw Pact forces? In August 1962 which French president survived an attack on his limousine near Paris? On August 22, 1989, which pitcher became the first to reach 5,000 career strikeouts? Which U.S. president was born on August 27, 1908, near Stonewall, Texas? Which U.S. president served from August 9, 1974, to January 20, 1977? Which rock legend died on August 9, 1995, in Forest Knolls, California? Auguste Bournonville, the father of Danish ballet, was born in 1805 in which capital city?