Effie Crockett (1857 - January 7, 1940), also known as Effie I. Canning, also known as Effie C. Carlton, was an American actress. She is credited with having written and composed the lullaby "Rock-a-bye Baby"; by some accounts she created the song in 1872 while babysitting. Because of "Rock-a-bye Baby", she is credited in over 100 films, many made decades after her death. Using only the above description and what you know about the world, "Effie Crockett lived to be at least 50 years old." is definitely correct, incorrect, or inconclusive? 