diff --git a/episodes/11-using-arrays-transformations.md b/episodes/11-using-arrays-transformations.md
index 746eb3a4..1f650ee7 100644
--- a/episodes/11-using-arrays-transformations.md
+++ b/episodes/11-using-arrays-transformations.md
@@ -29,7 +29,7 @@ Ask the students what transformation means to them currently.  Many may only kno
 
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-It does this using a function called uniques() which can be used to remove duplicates from an array. In this example we start with a list of subject words:
+It does this using a function called uniques() which can be used to remove duplicates from an array. In this example's Subject column, we start with a list of subject words:
 
 `crystal structure|clozapinium|crystal structure|molecular configuration|hydrogen bonding|supramolecular assembly|Chemistry|QD1-999`