Complex sentence: Rod Keenan, an American milliner, (born July 3,1968 in Great Bend, Kansas) is the creator of a handcrafted men's headwear collection that is marketed under his label "Rod Keenan New York".
Split into simpler sentences: Rod Keenan, an American milliner, was born in Great Bend, Kansas on July 3,1968. He is the creator of a handcrafted men's headwear collection that is marketed under his label "Rod Keenan New York".