It must have fourteen lines, with three groups of four lines that set up the subject or problem of the poem.

VOA: special.2010.01.06

Stress is more likely to be harmful if you feel helpless to deal with the problem or situation that causes the stress.

VOA: special.2009.03.24

Studies support the theory that there are several causes, instead of a single environmental cause or genetic problem.

VOA: special.2009.01.06

Toyota says it found a software problem that could briefly affect the "feel" of the anti-lock brakes on rough or slippery roads.

VOA: special.2010.02.05

It was not a problem that he might already have a wife and family, or that he might have chosen to marry another woman.

VOA: special.2009.04.18

A challenge that affects parents, children and citizens in almost every community in America should not be a Democratic problem or a Republican problem.

VOA: special.2010.08.12

But the problem is that the paper offered by the Ministry of Culture is used to print card wedding invitations or is sold.

VOA: standard.2010.08.09

And,there is a serious problem when you use the term 'regime change' that you might encourage people to demonstrate,or to act in ways, where we can do absolutely nothing to protect or encourage them."

VOA: standard.2010.06.11

are very similar genetically. "And that's a real problem when you're trying to overcome new insect or disease threats or pressures, or trying to breed a plant that's more water efficient, or even finding genetic variation for water production."

VOA: standard.2010.02.01

World Bank economist Louis Kuijs says he is not too concerned by strikes and says he does not see any signs that the industrial unrest will become a major problem for either social stability or for the Chinese and global economies.

VOA: standard.2010.06.24