4 November 2011 Last updated at 09:39 GMT

China mine disaster: Dozens trapped by 'rock burst'
Dozens of miners have been trapped in a coal mine in China after a "rock burst", officials say.

trap: (v.) keep somebody in a place from which he wants to move but cannot.
rock burst: 構内の気密状態の空気漏れで起こる落盤事故

Four miners were killed and 50 more are missing after the accident, which
happened late on Thursday in the city of Sanmenxia in Henan province.
State media reported that the rock burst - an explosion caused by the sudden release of built-up pressure - happened shortly after an earthquake.
Hundreds of Chinese miners die every year in pit accidents.
The industry is one of the most dangerous in the world, and is notorious for its lax safety standards.

The city of Sanmenxia in Henan province: 河南省三门峡市
the sudden release of built-up pressure: 管理されていた気密状態の突然の空気漏れ
pit accident:: 坑内事故
notorious for: 悪名高い (何か悪いことで名が知れている)
lax: not sufficiently strict

Earlier this week a gas explosion at a mine in neighbouring Hunan province killed 29 people.
But officials insist the country's record is improving, and say they have taken action by closing many illegal mines.

'Location confirmed'
State TV showed images of seven miners being carried out of the pit alive by rescue teams carrying oxygen tanks.
Officials from the state-run Yima Coal Group, which runs the Sanmenxia mine, said an "intense search" was going on for the missing miners.
"The location of the other miners has been confirmed and we are stepping up our rescue efforts," a company spokesman told the AFP news agency.

the state-run Yima Coal Group: 政府経営の义马(義馬)石炭グループ
intense search: 徹底した捜索
step up: improve something

Local safety officials said 75 miners had been working in the pit at the time of the explosion.
Some 14 managed to escape, seven were rescued and four have been confirmed killed, leaving 50 others trapped.
A small quake hit the area shortly before the rock burst.
Government safety chief Luo Lin told state-run CCTV that the tremor had helped to cause the rock burst.

manage to~:何とか~する。
had helped to cause the rock burst: 落盤事故の引き金となった。