diff --git a/curriculum/challenges/english/10-coding-interview-prep/rosetta-code/sedols.md b/curriculum/challenges/english/10-coding-interview-prep/rosetta-code/sedols.md
index 9d5ce33e9d3..8941cd8c9b0 100644
--- a/curriculum/challenges/english/10-coding-interview-prep/rosetta-code/sedols.md
+++ b/curriculum/challenges/english/10-coding-interview-prep/rosetta-code/sedols.md
@@ -8,7 +8,9 @@ dashedName: sedols
# --description--
-For each number list of 6-digit [SEDOL](https://en.wikipedia.org/wiki/SEDOL "wp: SEDOL")s, calculate and append the checksum digit. That is, given the input string on the left, your function should return the corresponding string on the right:
+SEDOL is a list of security identifiers used in the United Kingdom and Ireland for clearing purposes. The numbers are assigned by the London Stock Exchange, on request by the security issuer.
+
+SEDOLs serve as the National Securities Identifying Number for all securities issued in the United Kingdom and are therefore part of the security's ISIN as well. The SEDOL Masterfile provides reference data on millions of global multi-asset securities each uniquely identified at the market level using a universal SEDOL code.
710889 => 7108899