Complex sentence: Helen worked from 1917 to 1923 as a Instructor of Geology and Paleontology at Ohio State University and in 1920 was elected as a Fellow of the Ohio Academy of Science.
Split into simpler sentences: Helen worked from 1917 to 1923 as a Instructor of Geology and Paleontology at Ohio State University. In 1920 she was elected as a Fellow of the Ohio Academy of Science.