I would say your answer is "<span>a thought-provoking walk at night".
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The sentence would be a compound sentence, I believe.
They have influenced us by their democracy, philosophy, art, architecture, science and sports. We have taken their inventions, ideas, and creations. Some of which we made our own just based off of theirs or re-made what they had. The Greeks have infused their culture into ours.
<em>A particle that has a negative charge</em>
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<u><em>Electrons</em></u>
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<em>~Hope this answers your question!~</em>