Complex sentence: The Wainwright Building is among the first skyscrapers in the world, it was designed by Dankmar Adler and Louis Sullivan in the Palazzo style and built between 1890 and 1891.
Split into simpler sentences: The Wainwright Building is among the first skyscrapers in the world. It was designed by Dankmar Adler and Louis Sullivan in the Palazzo style and built between 1890 and 1891.