diff --git a/documentation/user-guide-basics/analyze-telephone-number.dmn b/documentation/user-guide-basics/analyze-telephone-number.dmn
new file mode 100644
index 00000000..e39a7e08
--- /dev/null
+++ b/documentation/user-guide-basics/analyze-telephone-number.dmn
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<definitions xmlns="https://www.omg.org/spec/DMN/20191111/MODEL/" xmlns:dmndi="https://www.omg.org/spec/DMN/20191111/DMNDI/" xmlns:dc="http://www.omg.org/spec/DMN/20180521/DC/" xmlns:biodi="http://bpmn.io/schema/dmn/biodi/2.0" id="Definitions_76910d7" name="DRD" namespace="http://camunda.org/schema/1.0/dmn">
+  <decision id="decision_1" name="Decision 1">
+    <decisionTable id="decisionTable_1">
+      <input id="InputClause_17b0zis" label="Last Name">
+        <inputExpression id="LiteralExpression_0x39cnu" typeRef="string">
+          <text>lastName</text>
+        </inputExpression>
+      </input>
+      <input id="input_1" label="Telephone Number ">
+        <inputExpression id="inputExpression_1" typeRef="string">
+          <text>telephone[-10:]</text>
+        </inputExpression>
+      </input>
+      <output id="output_1" label="The Real Chuck Norris?" typeRef="boolean" biodi:width="213" />
+      <output id="OutputClause_1673dq5" label="Which Number?" name="which_number" typeRef="string" />
+    </decisionTable>
+  </decision>
+  <dmndi:DMNDI>
+    <dmndi:DMNDiagram id="DMNDiagram_1cykosu">
+      <dmndi:DMNShape id="DMNShape_1dhfq2s" dmnElementRef="decision_1">
+        <dc:Bounds height="80" width="180" x="157" y="151" />
+      </dmndi:DMNShape>
+    </dmndi:DMNDiagram>
+  </dmndi:DMNDI>
+</definitions>