In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
One example: The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Solution is here: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Explanation: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

Now, solve this: He placed 53 songs on the " Billboard " Hot 100 , and its predecessors , between 1957 and 1973 , including " Poor Little Fool " in 1958 .
Solution:
He placed 53 songs on the " Billboard " Hot 100 , and its predecessors , between 1957 and 1973 , including " Poor Little Fool " in 1958 , which was the first # 1 song on " Billboard " magazine 's then-newly created Hot 100 chart .