TASK DEFINITION: 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].
PROBLEM: 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."

SOLUTION: Sam Querrey

PROBLEM: Winston Peters  leader of the New Zealand First Party  speaks during a media conference in Wellington  New Zealand  September 27  2017. REUTERS/Charlotte Greenfield
 New Zealand First leader Winston Peters  told local media that knowing the facts “puts us in a better position to make judgements”.
 Peters  has said  he  would only make a decision on which party to back after the final tally and after the results become official on Oct. 12.
But some say  Peters  could be swayed to go to National given it would be a straightforward coalition between two parties.
 Peters  a veteran New Zealand politician who has now held the balance of power three times   has in past elections formed coalition governments with both the National Party and Labour.

SOLUTION: Winston Peters

PROBLEM: Oliver Ivanovic  a prominent Kosovo Serb politician  was killed in a brazen drive-by shooting on Tuesday that could reignite ethnic tensions in the region.
An EU-backed Kosovo court sentenced  Ivanovic  in 2015 to a nine-year jail term after it found him guilty of encouraging the killings of captured ethnic Albanian civilians in Kosovska Mitrovica in April 1999.
In February last year  a Pristina appeals court quashed the sentence and ordered a retrial for  Ivanovic   who had been in detention since his arrest in January 2014 until the acquittal.
"Serbs are more afraid of Serbs than Albanians "  Ivanovic  -- a rare Kosovo Serb in that  he  spoke Albanian -- said at the time. "Serb people are afraid to raise their voice" against Belgrade's policy.
A former Serbian state secretary for Kosovo   Ivanovic  was a key interlocutor with NATO  the United Nations and later the EU after the war and was seen as backing dialogue with Kosovo's ethnic Albanians.

SOLUTION:
Oliver Ivanovic