Original sentence: " Several weeks prior, they had been given access to documents held back from them by Warner/Chappell, which included a copy of the 15th edition of The Everyday Song Book, published in 1927
Edited sentence: " Several weeks prior, they had been given access to documents "mistakenly" held back from them by Warner/Chappell, which included a copy of the 15th edition of The Everyday Song Book, published in 1927