Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].

Example Input: Mondayâs walkout was yet another symbol of how dramatically the U.S. presence at the annual climate summit has changed. In previous years  the government funded an official pavilion to showcase its climate action  among booths from dozens of other countries. The Trump administration declined to sponsor a pavilion this year  so  former New York City Mayor Michael Bloomberg  is footing the bill for the U.S. Climate Action Center  a sprawling series of inflatable domes just outside the main conference area.
Wolfgang Rattay/Reuters The Trump administration declined to sponsor a pavilion to showcase U.S. work on climate action this year  so  former New York City Mayor Michael Bloomberg  is footing the bill for the U.S. Climate Action Center just outside the main conference area.
At a packed launch event Saturday   Bloomberg  said  he  had gathered support for the Paris pact from public officials and leaders who represent some 130 million Americans  and  he  suggested their alternate delegation is just as relevant to the climate talks as the official U.S. negotiating team.
âIf Washington wonât lead  mayors  governors and civil society will â  Bloomberg  said. (âWell  I represent 300-something million Americans â Banks countered in an interview.)
Example Output: An Alternate Delegation Tries To Convince The World The U.S. Cares About Climate Change

Example Input: We know that  Nikolas Cruz  wasn't hiding a thing about  his  killing rage in the months and even years before the Florida school massacre.
According to the best British newspaper in America  the Daily Mail   Nikolas Cruz  abused his ex and sold knives out of a lunchbox.  He  was disciplined by the school 25 times and finally expelled.
Good Morning America could not pass up an interview with survivor Ariana Lopez. In her circle  everybody knew that  Cruz  was dangerous.  He  didn't bother to hide it. According to  Ms. Lopez  Cruz  was signaling  his  rage and murderous feelings like mad.
Lopez made it clear during her interview that  Cruz 's problematic behavior and mental health issues were on clear display at school. 'He used to sell knives out of his lunch box  which I thought was insane. You can't have knives  this is a school'  said Lopez of  Cruz . 'He would be like  "hey guys  want some knives?"' One of the incidents that led to his being disciplined was a fight in September 2016. Footage of the brawl emerged over the weekend.  Cruz  was suspended for two days as a result of the fight  which was over a former girlfriend.
This changes the picture completely: what the hell were the school counselors and police authorities doing while  Cruz  was signaling murderous intentions? There is an air of looming tragedy over the Florida school killings  and secretly  many people knew or suspected what was to come.
Any competent teacher  administrator  school cop  or counselor should have seen the signs and should have diverted  Cruz  into a protected environment where  he  could be educated and monitored. If  his  friend Ariana knew he was selling knives  so did dozens of other kids  teachers  administrators  and all the rest. No person in authority acted responsibly. They just kicked the can down the road.
There is no mystery about the Nikolas Cruzes of the world. They have been around forever. It's just that they were spotted and taken care of with discipline and  yes  with love and acceptance  whether they deserved it or not. If they acted out  they were punished appropriately  and if they looked dangerous  they were diverted to activities where they could do no harm.
That's what fathering is all about  and that is what the ancient phrase "in loco parentis" means.  Cruz  should have been effectively disciplined from childhood onward  but  he  was allowed to grow into a raging menace  recognized by other students and by numerous adults.
Example Output: Cruz told everybody: 'I'm a killer!'

Example Input: Bill Gates  and Richard Branson have some big goals.
Branson wants to go to space and send hyperloop pods shooting through underground tunnels at the speed of airplanes.  Gates  wants to rid the world of Polio and Alzheimer's disease  as well as implement the Bill & Melinda Gates Foundation's extensive list of other moonshots. Both the Microsoft founder and Virgin Group founder backed a start-up that grows meat in a lab and hopes to reduce the environmental impact of raising livestock.
And while some challenges seem insurmountable â even for a pair of the world's most powerful people â Branson and  Gates  agree it's crucial to chase big ideas  even if success isn't immediate.
" Bill  and I spoke about the importance backing long-shot projects " Branson writes on his blog about a meeting the billionaires had Tuesday. The two met in Paris for a summit focused on one such challenge  climate change.
"I've learned so much from  Bill .  He  built a formidable company and decided to put  his  vast wealth into solving the problems of the world " Branson writes.
For Branson himself  dreaming big has also been key to  his  success.
Example Output:
Bill Gates  Richard Branson: Why it is important to have big goals