Write the right answer to the question based on the context passage.

Ex Input:
I have been a teacher for many years and so many of my students have done nice things for me..they are just nice people.
I retired last year and was a substitute teacher this last school year. In June a teacher I had just subbed for a half day needed emergency surgery and I was asked to go in and finish her year. Good thing it was in an area I knewEnglish and Social at the grade 9 level. The kids were pretty goodsome were a handful but most of them were very accommodating. They were also writing important provincial exams at the end of the year and were getting stressed out about it.
As I was getting them ready to write their exam, I took a few moments to thank them for welcoming me into their classroom and making my jobwhile not easy.at least a rewarding experience.
One boy who seemed to complain about everything.thanked me for taking ownership and preparing them for final exams. I had recognized that his argumentative nature was his way of dealing with stress and tried not to let it affect my teaching. That mostly worked. There was a time when I told him, quite loudly, that if he had spent his time getting ready to do assignments instead of arguinghe could have been finished days ago. He just nodded his head and got to work. It was a nice gesture that he was able to thank me for doing my job.that he recognized that some things were out of his control and to just get on with it. A life lesson that I am still learning, by the way.
Every day lately, I have had something nice happen to me with my students. I am feeling blessed. Question: Who needed an emergency surgery?

Ex Output:
The teacher

Ex Input:
SINGAPORE Envoys from the United States and North Korea are holding talks to iron out any last-minute differences before Tuesday's historic summit between President Donald Trump and North Korean leader Kim Jong Un in Singapore.
White House press secretary Sarah Huckabee Sanders told reporters that veteran diplomat Sung Kim is leading the U.S. delegation in a working group meeting Monday at the city-state's Ritz Carlton hotel. The North Korea side is being led by Vice Foreign Minister Choe Son-hui.
Monday's meeting is apparently aimed at narrowing the gap between the U.S. and North Korea over the demand for North Korea to give up its nuclear weapons.
President Trump expressed confidence about his meeting upon his arrival in Singapore Sunday, telling reporters after stepping down from Air Force One that he his feeling "very good" about Tuesday's summit.
Ahead of his arrival, Trump acknowledged he is heading into "unknown territory" for the meeting Tuesday.
In response to a question from VOA News just before heading to Asia from the Group of Seven summit in Canada, Trump said "I really feel confident" about the unprecedented encounter between a sitting American president and a member of the family dynasty which has maintained iron-fist control over one of the world's most reclusive countries for three generations.
Trump added that he believes Kim, half the age of the American president, "wants to do something great for his people." But Trump cautioned that Kim "won't have that opportunity again" if the talks do not go well -- describing this opportunity for diplomacy with the United States as a "one-time shot."
Trump and others in his government have said advancement has been made on obtaining a commitment from Kim to give up all his nuclear weapons and long-range ballistic missiles. Progress could lead to a peace treaty and formally end a state of war on the Korean peninsula, which has persisted for nearly 70 years.
Whether such a deal can be done, Trump declared on Saturday, is something he will know almost from the moment they meet. Question: Who is leading the U.S. delegation at the Trump-Kim summit?

Ex Output:
Veteran diplomat Sung Kim.

Ex Input:
Went straight from a facility that deals with homeless children (492 1st Ave, Manhattan, New York) to the extreme outskirts of Queens near Kennedy Airport about 20 miles away.
It was winter and I had no coat. I had my book bag and my sole Trader Joe's bag of clothing and was loaded into a van with three social workers. During the long drive in traffic, I fell asleep, so waking up at my new home, I couldn't make out any street signs and the numbering on the houses did not indicate whether I was in a home in the Bronx or Eastern Queens (which share the same street numbering in certain instances).
My foster parents showed me my room and left a plate of food on the table. They barricaded themselves in their bedroom quite like how pilots barricade themselves behind the fortified cockpit door. However, my room didn't have a lock, and neither did the bathroom. There were bars on my windows with a view of a church parking lot. I took great care to avoid waking a significantly older teen (I was 14, so he must have been 1920) sleeping on the other bed. I heard two other kids (my foster siblings) in the other room playing music and giggling loudly at 3 in the morning. At 4 in the morning, my foster father started reading the Quran pretty loudly, and then he goes back to bed.
In the morning, my foster parents are gone. My foster siblings are all sleeping. I got up at 7, but I don't know how far I am from my high school, what buses/train will take me there, and still don't know anything about anything about my new home. I don't even know the names of those I'm relegated to living with. The unnerving strangeness and disorientation hat comes with knowing that your life has changed and the culture shock that comes with that is so scary and desensitizes you on that first day. Question: Who showed him the room?

Ex Output:
his foster parents