Write a question from the passage such that it identifies a character (a person or a thing) in the passage.

Let me give you an example: I really struggle to feel bad for people who actively choose to be miserable and manipulative. I'm dorky and like to use little proverbs all the time. One of my favorites is this: "you can lead a horse to water, but you can't make him drink." At the end of the day, if someone has a problem, they can never resolve it if they don't truly wish to. You can give someone all the resources in the world, but you can't force them to utilize them. When I was 16, I dated a horrible guy. He was abusive verbally, emotionally, and sexually. He was an incredibly troubled young man and refused to seek help for his severe mental health issues. I eventually came to understand that he reveled in his misery. It was his identity. He acted like he wanted a cure and I'd set him up with resources, but he refused every single one. He may have struggled with serious mental illnesses, but being miserable perversely made him happy and he loved to use his struggles to justify his inexcusable behavior. He wanted to drag as many people into his fiery pit of anguish as possible. I later suffered from severe depression myself, and I never once used it as an excuse to hurt other people. My ex wasn't struggling with his mental health in terms of deliberating and carefully harming others. He was simply exhibiting a personality trait, one he chose to cultivate… and it wasn't my problem. I ended up cutting him off completely in spite of all the threats. I will never feel bad for the awful plight he refuses to help himself out of. I have no patience for that type of person. Know what we call them? Toxic. Poison. A waste of time.
The answer to this example can be: Who was abusive to the author?
Here is why: The question is based on the following sentences in the passage - 'When I was 16, I dated a horrible guy. He was abusive verbally, emotionally, and sexually.'. The sentence clearly explains that the author's boyfriend was abusive to her.

OK. solve this:
SEOUL, SOUTH KOREA — U.S. President Donald Trump's decision to withdraw from the Iran nuclear agreement is not expected to derail diplomatic momentum to reach a deal to end North Korea's nuclear weapons program, but it could complicate the negotiation process, analysts say.
Trump on Tuesday announced that the United States is ending its participation in the 2015 Joint Comprehensive Plan of Action (JCPOA) that lifted sanctions on Iran in exchange for Tehran limiting its nuclear program, and would re-impose U.S. economic sanctions on Iran. The agreement was negotiated by the administration of Trump's predecessor, President Barack Obama, and involved five other world powers; Great Britain, France, Germany, China and Russia.
Trump's National Security Adviser John Bolton said the U.S. decision to re-impose sanctions on Iran will set a higher standard for North Korea nuclear talks by sending, "a very clear signal that the United States will not accept inadequate deals."
The U.S. policy reversal on Iran should not seriously impede diplomatic progress underway with North Korea, said Victor Cha, a noted Korea scholar with the Center for Strategic and International Studies in Washington.
"In terms of how the North Koreans would take it, I don't think they'd take it one way or the other. I don't think they'd see it as negative or positive because they think they're different from anybody else anyway. They think they're a very special case," Cha said at a CSIS conference this week.
While the Iran deal limited that country's efforts to develop a nuclear bomb, North Korea already possesses 20 to 60 nuclear warheads, according assessments by the U.S. Central Intelligence Agency and the Defense Intelligence Agency, and between 40 to 100 nuclear development facilities, according a report from the RAND Corporation security research organization.
But apprehension over whether future U.S. presidents would uphold a nuclear deal reached by Trump could reinforce the North Korean demand for early concessions.
John Delury, a North Korea analyst with Yonsei University in Seoul, said on Twitter, "I don't think this is insurmountable but it adds yet another layer of difficulty."
In some ways Pyongyang may be reassured that a deal reached with the Trump administration would likely be supported by the next administration to follow.
Answer:
Who announced the US is ending participation with JCPOA from 2015?