Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].

Q: Sam Querrey gave the United States a winning start in its bid to reach Saturday's final at the World Team Cup.
 Querrey beat Jan Hajek 6-3  7-5 on Thursday to put the U.S. 1-0 up against the Czech Republic in the Red Group and remain unbeaten in his three singles this week.
 "So far so good " said Querrey. "I thought today was the best I played out of the three matches. So I'm pretty excited."
 Hajek claimed the first break  when Querrey ended a long rally with a forehand error  to go 3-1 up but the American player responded by winning the next five games in a row to take the opening set.
 Both players saved a break point late in the second set before Querrey broke at 6-5  converting his third match point.
 "I've been working this week to try and hit my forehand a little bigger. I felt I did that today " said Querrey. "I felt pretty much anytime I got a forehand  I was able to take control of the point."
 Querrey said his win takes the pressure off the U.S. ahead of Friday's matches.
 "A little bit  yes. I think John (Isner) can go out there and play a little more freely  which is a good thing " Querrey said. "When we have the lead  you can swing away a little bit more than if we were 1-0 down.
 "Then  the Bryan brothers  we expect them to win every match. Hopefully  they are going to do that again."

A: Sam Querrey
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Q: And yet , as just about everyone with internet access is now aware , Texas Sen. Ted Cruz , a Republican presidential candidate in 2016 , appeared to have liked a pornographic video on Twitter overnight . 
We do n't know for sure it was Cruz himself who did the "liking" -- as the senator explained this morning , "There are a number of people on the team that have access to the account and it appears that someone inadvertently hit the like button ." 
Below Cruz discusses the scene -LRB- that is , the one inside the court -RRB- with CNN 's Jake Tapper . 
JUST WATCHED Ted Cruz on watching porn with Justice O'Connor Replay More Videos ... MUST WATCH Ted Cruz on watching porn with Justice O'Connor 01:38 . 
But that conversation , and others surrounding his book , did n't come close to being the first time Cruz happily discussed pornography on camera . 
In February 2016 , during the Republican primary season , the Cruz campaign posted a web video featuring an actress who had appeared in erotic films . 
Asked by some unknown interviewer about his life 's ambitions , the young Cruz pauses for effect , then announces : "Well my aspiration is to , oh I do n't know , be in a teen tit film like that guy who played Horatio . 
-LRB- Politico guessed Cruz was referencing 1986 's The Malibu Bikini Shop . -RRB- 
"It happened that one of the actresses who was there had a more colorful film history than we were aware ," Cruz told reporters on the trail . 
Cruz 's talents would send him in other directions . 
Cruz did not appear in the scrubbed campaign clip , but he has spoken -- and written -- at some length about another unlikely run-in with the adult film industry . 
This was years ago , when Cruz was a clerk on the high court for the late Chief Justice William Rehnquist . 
As Cruz recalled it in his memoir , O'Connor , Rehnquist , and their respective clerks gathered for an exhibition -- as it related to a case they were considering on the regulation of online porn -- in a small room .

A: Ted Cruz
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Q: Taoiseach (Prime Minister) of Ireland Leo Varadkar speaks on stage during his opening address of the Fine Gael national party conference in Ballyconnell  Ireland November 10  2017. REUTERS/Clodagh Kilcoyne
That would break the three-year “confidence and supply” agreement that allowed Varadkar’s Fine Gael party to form a minority government 18 months ago.
Fianna Fail initially indicated it might withdraw its threat if Fitzgerald resigned but Fine Gael members of parliament passed a unanimous motion of support in Fitzgerald at an emergency meeting on Thursday evening.
Asked after Fine Gael’s statement whether the country was headed for an election  a senior Fianna Fail source replied: “Straight towards one.”
“This is ... dangerous politically at a time when the country does not need an election ”  Foreign Minister Simon Coveney of Fine Gael  told national Irish broadcaster RTE  in an apparent reference to the Brexit talks  he  had earlier described as a “historic moment” for the island of Ireland.
The Fianna Fail move comes after Fitzgerald admitted she was made aware of an attempt to discredit a police whistleblower in a 2015 email  but failed to act. Fine Gael say she adhered to due process.
Since Varadkar’s appointment as Fine Gael leader in May  his party has narrowly led Fianna Fail in opinion polls that suggest both parties would increase their support but still struggle to form anything but another minority government.

A:
Frances Fitzgerald
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