"The horses go in for one or two minutes, " De Mieulle says.

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Nationwide, 250, 000 water lines burst a year, or about one every two minutes, flooding and closing streets, interrupting water service, and requiring residents to boil water for safety, wrote New York Times reporter Charles Duhigg in a special series on water issues.

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Shoppers are likely to abandon a line that might take between one and 10 minutes to get through after the first two or three minutes if they feel it isn't moving sufficiently fast enough for them, says Narayan Janakiraman, an assistant professor of marketing at Eller College of Management at the University of Arizona.

WSJ: Find the Best Checkout Line

Classical record labels mostly sell album concepts with one or two works with average playing times of around 25 to 30 minutes each.

CNN: Facing down the pirates

Pennetta came through 6-2 6-2 in one hour and four minutes and goes on to face fellow Italian Roberta Vinci or France's Virginie Razzano in round two.

BBC: Anne Keothavong falls at first French Open hurdle

If one or both of those challenges is denied, then the team does not get a third challenge (in the last two minutes of each half of play, team challenges are not necessary as the officials automatically review all controversial plays during this time).

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