diff --git a/sentence_structure.txt b/sentence_structure.txt
index 72c06a1..4e45e00 100644
--- a/sentence_structure.txt
+++ b/sentence_structure.txt
@@ -2,4 +2,5 @@
 2. I suppose If I had to choose one ..... (person, thing, subject) it would be ......(elon musk, mathematics)
 3. The more ... (I, you) .... verb (use) English; the more your skills will improve and the higher your chance of getting the score you need.
 4. He is prone to making mistakes under pressure. 
-5. The illustration demonstrates the process of producing electricity in a nuclear power station.
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+5. The illustration demonstrates the process of producing electricity in a nuclear power station.
+6. Rule of Three ( X, Y, and Z)      for instance (hard work, consistency, and patience)
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