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One of the people behind the stean engine (Thomas Savery) was born
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The first improvements to the steam engine were created
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The first full-scale steam engine was created and was put into use
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The second version with improvements was put into use
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The first thinker of the steam engine passed away
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The first improver has died
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John watt was the best improver to the steam engine so far
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The 3rd greatest improvement was made
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