Year of double-digit Epic
Rule. First two words express the number of the year of double-digit.
1958→ 58 →5 (5 letters) 8 (8 letters)
Found(5) European(8) Economic Community.
Begin(5) Campaign(8) for Nuclear Disarmament by Bertrand Russell.
Great(5) Nautilus(8) crosses the North Pole under water.
China(5) conflict(8), Chinese Civil War: The Second Taiwan Strait Crisis .
Great(5) bitterly(8) Chinese Famine.
World(5) clerical(8) Pope John XXIII succeeds Pope Pius XII.
World(5) artistic (8) bossa nova is born in Rio de Janeiro.
SCORE(5) launches (8), the first communications satellite.
If you try to make this, "number of letters" is on the Internet with the word "cross word".