They were defeated, at least temporarily, in 2010, but they haven't given up the fight.
The women's loved ones said they hadn't given up hope of seeing them again.
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Meanwhile, lawmakers who support tighter gun laws say they haven't given up trying to pass legislation.
That said, they haven't given up on looking for such a legally enforceable guarantee mechanism.
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Mars, our next-door neighbor in the solar system, hasn't given up many of its secrets yet.
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But cardiologists haven't given up on old-fashioned heparin, which is often used in combination with other anti-clotting drugs.
Congress has declared any notion of capping such deductions dead on arrival, but the White House hasn't given up.
"The great thing is that we haven't given up, " he told BBC Sport.
Conservative Party chairman Grant Shapps has told the BBC he "hasn't given up hope" changes to constituency boundaries will happen.
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Dow's engineers haven't given up yet and they are now trying to land some business making parts for refrigerator manufacturers.
Despite Nero's betrayal, Octavia still hasn't given up on saving their marriage.
Yet amid the performance work Han, at 48, hasn't given up couture.
"We certainly haven't given up and thrown the towel in, we're meeting with the council next week, we're putting an appeal together, " he said.
Citigroup municipal-bond analyst George Friedlander said he hadn't given up hope yet that concerted lobbying by states and cities could persuade Congress to renew BABs.
And even though it's been a very long time since the first knives were crafted out of stone, we haven't given up on that ancient manufacturing technique.
And although Yurke hasn't given up on DNA computers (he's working on a DNA neural network), he is excited about this use of DNA. Leonard Adleman is too.
But even in the face of these obstacles, even in these tough times, all across the country there are people like Rick and Dennis and Ruth and Will who haven't given up.
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Then my brother hadn't given up music altogether?
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And he has called for reform of Medicare and Medicaid and doesn't seem to have given up quite yet on Social Security reform.
It wasn't clear if RIM had completely given up its fight to hold onto the BBX name.
For Rick Randall the journey from modest blue-collar beginnings in a Buffalo suburb to riches didn't add up to much, given that he lost his family in the process.
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