One man who knows all about waiting for a first grand slam title is Ivanisevic.
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Today, an international panel has just told the world how it can reduce greenhouse gases, and we're meeting a man who knows all about that.
Hundreds of miles away, a woman who knows all too well what Ethan may have gone through expressed her own thanks Wednesday for the boy's safety.
One man who knows all about the rigours of an Indian tour is Somerset all-rounder Ian Blackwell, who was part of the team beaten 5-1 in 2006.
Someone who knows all too well what Ethan may go through is Katie Beers, who as a 10-year-old was held underground in a concrete bunker for two weeks by a New York man.
Coach Brian Noble, who knows all about Fielden's quality from their time together at Bradford and with Great Britain, will be hoping that his presence will lift an injury-hit dressing room which is low in confidence.
One competitor who knows all about the event's challenges is Tamsin Jones, who finished 87th out of 88 riders in the motorbike category in 2010 to become only the second British woman to complete the race.
Australia's Adam Scott -- a man who knows all about dropping four shots at the end of a round -- also opened with a 68, while Open champion Ernie Els compiled a steady par round of 72.
But who knows what all of this means to ordinary Istanbul people.
And that is why Barack fought to double funding for Pell grants and keep interest rates down for our schools. (Applause.) We have a President who knows that all of our kids have to be able to afford a college education.
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One woman who knows that fight all too well is singer Candi Staton.
Who knows, perhaps all those hours spent honing your Starcraft skills can soon be put to good use defending the country.
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Nothing, perhaps, is so dangerous intellectually in the policy sciences as an economist who knows only economics, except, I would add, a moral philosopher who knows no economics at all.
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For an already talismanic figure at Bolton who has played through all four divisions, who knows what reaching the pinnacle of an England footballer's career might yet inspire?
There are masters and magicians and druids and emporers, and who knows what else, all gaming for your money.
Anyone who has experienced this knows all about extra-long sheets and shower caddys.
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UN's overstretched peacekeeping department is expected to remind Mr Annan, who already knows the facts all too well, just how tough peacekeeping in Congo would be.
Mr. KAGAN: Anyone who knows the Pakistan issue at all well will tell you that there are no easy solutions.
After all, who knows what evil (or sloth or honest but stupid mistakes) lurks in the hearts of men (and women)?
And who knows, maybe one of you all sitting at this table, one of our little mentees, will be living and studying somewhere in India -- maybe New Delhi or Mumbai or Bangalore.
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So, battles on the Tunisian- Libyan border, calls for public demonstrations in Teheran, unrest in Bahrain, Algeria that suggests the daisy chain moves ultimately to Saudi Arabia, Kuwait, and who-knows-where-else all add up to uncertainty about oil prices.
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Anybody who has seen my movies knows that we all fail.
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After all, anyone who travels internationally knows that there are dozens of plug designs that accomplish the same basic function: delivery of electricity to a power cord.
He's an excellent statesman and, above all, he's someone who knows how to listen.
If he keeps this up, who knows how good T-Mac will be before all is said and done?
Who knows whether the symptoms are just being noticed once all the activities wind down or whether a child is simply fatigued enough that their immune system becomes a little weak.
Anyone who's up on their Foucault or Bentham knows that all you gotta do is make it clear that you can and the problem should solve itself.
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