diff --git a/WetPancake/ProductServices.fs b/WetPancake/ProductServices.fs
index a0d464c..5bba548 100644
--- a/WetPancake/ProductServices.fs
+++ b/WetPancake/ProductServices.fs
@@ -18,14 +18,21 @@ module Pancake =
///
///
/// The number of sentences the cleaned string should have.
+ /// This should be smaller than the number of sentences the original text has.
///
///
/// The string to clean.
///
+ ///
+ /// A string of text which has been trimmed to the specified sentence count.
+ ///
+ ///
+ /// Thrown when the number of sentences requested is bigger than the number in the text passed in.
+ ///
///
/// This function's aim is to trim or remove excess sentences.
/// If the string has less sentences than the number requested, it will not change.
- ///
+ ///
let CleanResultAsync noOfSentences text =
async {
try