Complex sentence: From Western High School, she went to Vassar College in New York (where she was a classmate of the famous poet Edna St. Vincent Millay), graduating in 1917 with a Bachelor of Arts.
Split into simpler sentences: From Western High School, she went to Vassar College in New York. She was a classmate of poet Edna St. Vincent Millay and graduated in 1917 with a Bachelor of Arts.