Update readme with object format

12_findTheOldest/README.md

@@ -2,6 +2,27 @@
 
 Given an array of objects representing people with a birth and death year, return the oldest person.
 
+The objects follow this format:
+```javascript
+const people = [
+      {
+        name: "nameA",
+        yearOfBirth: 1880,
+        yearOfDeath: 1920,
+      },
+      {
+        name: "nameB",
+        yearOfBirth: 1950,
+        yearOfDeath: 2000,
+      },
+      {
+        name: "nameC",
+        yearOfBirth: 2000,
+        yearOfDeath: 2021,
+      },
+    ]
+```
+
 ## Hints
 - You should return the whole person object, but the tests mostly just check to make sure the name is correct.
 - this can be done with a couple of chained array methods, or by using `reduce`.