answer: Mark shares his story of how he learned to say the first word, truck, when he was about 18 months old.
documents: #Person1#: There are many interesting stories about how a baby learns to say its first word. Now, Mark, would you like to share your story with us?
  #Person2#: OK. Here's my story. I was about 18 months old, I think, and I had just started saying my first word. Every time a truck went by, I would shout a word that sounded like truck, but to everyone else, it sounded nothing like it. My parents tried to correct me, but failed. Then about 3 months later we traveled to New York as we were waiting for our plane at the airport. I looked out of a huge window. At that very moment, I saw the largest truck in the world. I had to tell someone about this. I turned my father, who was standing next to about 1000 people waiting for various flights and screamed truck, truck. My father tried hard to shut me up, but I was so excited. I kept screaming my special word. My poor mother decided she didn't know this baby and ran into the ladies room where she hid until I finally stopped. Well, I learn how to say truck correctly and soon I was talking like a normal child. However, my parents will never forget the very first word I produced in my life.