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].

Ex Input:
Roger Federer dominated Andy Murray on Tuesday at the ATP World Tour Finals and stretched his record to 2-0 at the season-ending event by winning 6-4  6-2.
 Federer looked unstoppable on the court at the O2 Arena  losing only eight points on his serve in the match -- three in the first set and five in the second.
 "He came out and made some mistakes. Maybe it was due to my good play " Federer said of Murray  who made 26 unforced errors. "I played tough and solid from start to finish. That seemed to be enough today."
 Later Tuesday  Robin Soderling was to face David Ferrer in the other Group B match. Federer can advance to the semifinals depending on the late result.
 Federer has won the season-ending event for the top eight players in the world four times  and he can certainly add to that if he keeps playing like he did Tuesday.
 Murray  however  dropped to 1-1 and will have to improve if he is to reach the semifinals. He will face Ferrer in his final match Thursday while Soderling takes on Federer.
 final match Thursday while Soderling takes on Federer.
 Murray struggled from the start Tuesday  forced to save a break point in the opening game. And it was his serve that was letting him down most of the way  landing only 44 percent of the first serves. That allowed Federer to take advantage of the much slower second serve.
 Federer earned his first break in the third game of the first set  winning all four points played. He then won his next three service games at love.
 In the second set  Murray saved two break points in the opening game  but Federer stayed alive through four deuces to earn a third break point  which he converted with a forehand that hit the top of the tape and zipped past Murray.
 After holding at love yet again  Federer broke again to make it 3-0 and soon led 4-0.
 "I tried to play quite aggressive. You're not going to hit winners every single time you go on the court " said Murray  who is 8-6 overall against Federer. "Today I made more mistakes than normal."

Ex Output:
No. 2 Federer beats Murray in 2 sets at ATP finals


Ex Input:
Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  poses for a photo during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017. REUTERS/Pedro Nunes
Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  talks with a Reuters reporter during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017.  REUTERS/Pedro Nunes
  He  has since launched Vivaldi  which includes functions  he  says bigger browsers lack. Vivaldi.net does not track searches and is based on an online community of users who recommend features   he  said.
Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  talks with a Reuters reporter during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017.  REUTERS/Pedro Nunes
Google (GOOGL.O)  dominates the online advertisement market and  it  closed Vivaldiâs advertising account. Google partnered Opera before launching the Chrome browser in 2008.
 He  said  he  was increasingly concerned about data collection and tracking by tech giants like Google and Facebook.

Ex Output:
Founder of web browser Opera says worried about online privacy


Ex Input:
Economist Angus Deaton and Princeton University Professor Anne Case  told the Wall Street Journal that the opioid crisis  alcoholism  and suicide continue to aggravate the American white working class mortality rate.
 Dr. Deaton  suggested that the country’s white community split into two camps: white Americans with bachelor’s degrees continue to thrive  while American whites without a bachelor’s degree face increasingly dire circumstances.
I think there are several answers to that. Mortality rates for suicide  for drug overdose  for alcoholism are rising for people without a college degree. Those are the big increases that we’re seeing  and it isn’t just about the financial crisis. This started back as far as we can break out education in death certificates  which is 1990. It has been a slow  steady trend up in all three of those for people without  a B.A.
Deaton  then suggested that one of the reasons that the white working class mortality rate skyrocketed in recent years is that  compared to European countries  America has much looser control over opioids.  Deaton  said:
The two researchers suggested that America’s white working class continues to have their institutions: family  church  and job  disappear. Case and Deaton speculated that white America’s crumbling institutions has led to rising opioid addiction  alcoholism  and suicide.

Ex Output:

Princeton Scholars: Opioid Crisis Alcoholism Suicide to Blame for Rising White Working Class Mortality Rate