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 Q]: and Sen. Ted Cruz -LRB- R-Texas -RRB- , who trailed right behind the frontrunners in the Republican and Democratic primaries , will debate each other and field questions from audience members in a town hall on CNN . 
CNN 's Dana Bash and Jake Tapper -- who questioned Republican primary candidates like Cruz during a debate in 2015 -- will moderate Wednesday night 's debate at 9 p.m. ET . 
The two senators diverge dramatically on the ideological spectrum , with Sanders describing himself as a "democratic socialist" and Cruz often seen as a staunch conservative . 
While Sanders has vilified rich corporations for their alleged greed , Cruz advocated for more than halving the corporate tax rate in September . 
According to Reuters , Cruz sought a 15-20 percent tax rate , similar to proposals issued by Trump and much lower than the current 35 percent rate . 
Cruz has argued for eliminating the estate tax , also known as the "death tax ," while Sanders has called for a progressive estate tax structure . 
Earlier this year , CNN hosted a debate between Sanders and Cruz on health care reform .
[EX A]: Bernie Sanders and Ted Cruz to Square Off During Televised Tax Reform Debate on Wednesday . 

[EX Q]: The prime minister  is to call on investors to boycott social media platforms that do not delete and censor perceived âextremistâ views.
Speaking at the Davos World Economic Forum  Theresa May will argue that not enough is being done to fight terrorism and paedophiles online.
âTechnology companies still need to go further in stepping up to their responsibilities for dealing with harmful and illegal online activity â  the prime minister  will say according to advance extracts of  her  speech.
Tech companies need to take their responsibilities to society seriously. Thatâs why today at #Davos18  in front of the worldâs leading business men and women  I will set out how together we can shape the standards  norms and rules of how we behave in the digital world. #WEF18 pic.twitter.com/PMgXWVTNvL â Theresa May (@theresa_may) January 25  2018
[EX A]: Theresa May at Davos: Investors Must Boycott Social Media Firms Not Censoring 'Extremist' Views

[EX Q]: Meanwhile  Wells said  remotely operated vehicles trolling the sea floor around the well bore and two other capturing sonar data have not detected any breaching yet.
 The company said oil stopped leaking at 2:25 p.m. local time Thursday after engineers gradually dialed down the amount of oil flowing through the last of three valves on the cap.
 said oil stopped leaking at 2:25 p.m. local time Thursday after engineers gradually dialed down the amount of oil flowing through the last of three valves on the cap.
 Wells said BP will run a second seismic survey Friday to check for a breach in the well. It will take 24 hours to evaluate the seismic tests.
 Data gathered during the test will be reviewed at 6-hour intervals. Wells said any decisions to end the test or re-open the well will be made by federal officials.
 Meanwhile  Wells said work restarted Friday on the drilling of the first of two relief wells  which is seen as the only permanent way to plug and seal the breached underwater well.
[EX A]:
Roundup: BP says well integrity test goes well so far