Here's a short story:

Billy Dengler, a 14-year-old boy, is in the eighth grade. A month after he was born, Billy's mother, Terri, noticed that his eyes weren't quite as big as a normal baby's. She took Billy to the hospital, and the doctor said Billy would never be able to see. Although Billy can't see, he has never let that hold him back or make him different. Billy began teaching himself computer programming by using a screen reader when he was just seven years old. He is a certified Google developer now. Google even tried to offer him a job last year when he discovered a problem in one of its _ , but Billy wasn't old enough. Billy's dream school would be Stanford University or MIT, where he could get a very good education in computer science. After he leaves school, whether he will go to work at a company like Google or design a software company of his own is still to be decided. However, he says he will definitely do something great. "It's a sighted world," Billy said. "You can't let anything get in the way of your dreams, and if you do that, you can't move forward and make your dreams come true." (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Who is this article about?
Guess: Billy Dengler

Question: Who is Billy Dengler?
Guess: a 14-year-old boy

Question: What is unique about him?
Guess: his eyes weren't quite as big as a normal baby's

Question: When did they notice that?
Guess: A month after he was born

Question: Can he see?
Guess: Billy would never be able to see

Question: Did he let that get him down?
Guess: No

Question: What does Billy believe?
Guess: You can't let anything get in the way of your dreams

Question: What grade is he in now?
Guess: unknown

Question: What are his goals?
Guess: Stanford University or MIT

Question: Is he good with computers?
Guess: Yes

Question: Where did he learn that?
Guess: Billy began teaching himself computer programming

Now answer the following question in the same format.

Question: When?

seven years old