Here's a short story:

A 13-year-old boy traveled to Washington, D.C. to raise money for homeless kids. Zach Bonner was pretty tired. Instead of going to camp last summer, Zach decided to walk 668 miles from Atlanta to Washington, D.C. He hoped more people would help homeless kids. His journey to help others began six years ago. Zach walked from his home in Tampa to Tallahassee. Then, in 2008, Zach Bonner went on a 270-mile walk from Tallahassee to Atlanta. In 2010, he did it again, from Tampa to Los Angeles. Last summer, Zach traveled 12 miles every day on foot. Along the way, he collected more than 1000 letters about homeless children. He hoped to give the letters to President Obama. Zach says he wants his walk to make a difference. More than 1 million children in the U.S. have nowhere to live. During his journey, Zach spent 24 hours with some homeless children so he could learn the difficulties they face. When Zach walked the last mile of his long journey, more than 500 supporters, including 300 homeless kids, joined Zach. They went with him down the National Mall. "It was a long walk," Zach says, "but it was meaningful." Although the journey is difficult and tiring, Zach won't give up. "When homeless kids get tired of being homeless, they don't get to stop. So why should I stop when I get tired of walking?" (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: How many children in the U.S. are homeless?
Guess: More than 1 million

Question: What is the boy's name?
Guess: Zach Bonner

Question: How old is he?
Guess: 13

Question: Who was he raising funds for?
Guess: homeless kids.

Question: Where is he from?
Guess: Tampa

Question: How many miles did he walk in 2008?
Guess: 270-mile

Question: What city did he start that walk in?
Guess: Tallahassee

Question: What city was the final destination on that walk?
Guess: Atlanta

Question: How many letters did he collect?
Guess: more than 1000

Question: About what?
Guess: homeless children

Question: To whom did he want to give the letters?
Guess: the president

Question: Which one?
Guess: Obama

Now answer the following question in the same format.

Question: How many hours did Zach spend with homeless kids?

24 hours