Proofread this extract and correct the six errors involving inverted commas. Remember to only use "double" inverted commas when adding them.

Never before had a human being experienced a silence so absolute. In 1965 he was 300 miles above the Earth, and what no one knew was that he was minutes from death. Fifty years on, "Alexei Leonov", the first man to walk in space, explains what happened next.

It was absolutely still, he says. I heard the beating of my heart; I heard my heavy breath. Below him was a planet without borders–the East and the West an unbroken stretch of land, the Iron Curtainin visible. "On my right were the Volga River and the Ural Mountains. On my left were Bulgaria, Greece and Italy. Then I looked up and I saw the Baltic Sea."

the correct format for this paragraph is as follows

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Explanation:

In 1965 he was 300 miles above the Earth and what no one - including Leonid Brezhnev - knew was that he was minutes from death. Fifty years on, Alexei Leonov, the first man to walk in space, explains what happened next.

Never before had a human being experienced a silence so absolute. “It was absolutely still,” says Alexei Leonov. “I heard the beating of my heart; I heard my heavy breath.” Below him was a planet without borders – the East and the West an unbroken stretch of land, the Iron Curtain invisible. “On my right, the Volga and the Ural Mountains. On my left Bulgaria, Greece, Italy. Then I looked up and I saw the Baltic Sea.”

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explanation:

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-sawyer