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The problem was that he was so much a part of the age he described, the "Roaring Twenties."

VOA: special.2010.11.21

The problem may last a few seconds, but it can get worse and worse with age, leading to a heart attack or stroke.

VOA: special.2010.03.02

Lemelson died in 1997 at the age of 74, but the foundation that he set up promotes problem-solving through invention and innovation.

VOA: standard.2009.12.18

But what about the elderly and the problem of age-related decline?

FORBES: World of Warcraft May Protect the Aging Brain

His real problem is age.

ECONOMIST: The centre-left holds on for now; can Silvio Berlusconi?

This is not a problem that can be solved by industrial-age collective action models because the problem is the end of the industrial age.

FORBES: Kubler-Ross and #OccupyWallStreet