[PAR] [TLE] Effie Crockett [SEP] 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. [PAR] [TLE] Rock-a-bye Baby [SEP] 'Rock-a-bye Baby' is a nursery rhyme and lullaby.  The melody is a variant of the English satirical ballad Lillibullero .  It has a Roud Folk Song Index number of 2768.
[PAR] [TLE] Effie Crockett [ SEP ] 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 . [PAR] [TLE] Rock - a - bye Baby [ SEP ] ' Rock - a - bye Baby ' is a nursery rhyme and lullaby . The melody is a variant of the English satirical ballad Lillibullero . It has a Roud Folk Song Index number of 2768 .
What is the Roud Folk Song Index number of the lullaby Effie Crockett wrote  in 1872?
What is the Roud Folk Song Index number of the lullaby Effie Crockett wrote in 1872 ?
2768
2768