Here’s a revised version of the text with the appropriate transformations based on your prompts:
Mary and John have been married for 50 years. They live in a small town called Willow Creek. They met each other at a disco when they were in their twenties. Mary is a bit taller than John, but he is the oldest person in the family. They have two children: a son and a daughter, and four grandchildren. They love them very much. This beautiful cake is made by their grandson. Today Mary and John are celebrating their 50th anniversary. This is the first time they celebrate their special day with close people. Five presents are from their relatives and friends.
Let me know if you need further assistance!