TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: the petitions at the end of the hymn -lrb- beginning salvum fac populum tuum -rrb- are a selection of verses from the book of psalms , appended subsequently to the original hymn.

SOLUTION: the petitions at the end of the hymn -lrb- beginning salvum fac populum tuum -rrb- are a selection of verses from the book of psalms , later changed to the original hymn.

PROBLEM: convinced that the grounds were haunted , they decided to publish their findings in a book an adventure -lrb- 1911 -rrb- , under the pseudonyms of elizabeth morison and frances lamont.

SOLUTION: convinced that the grounds were haunted , they decided to publish their findings in a book an adventure -lrb- 1911 -rrb- , under the fictitious name of elizabeth morison and frances lamont.

PROBLEM: most of the songs were written by richard m. sherman and robert b. sherman.

SOLUTION:
most of the songs were composed by richard .