Complex sentence: From January 1925 to the autumn of 1926, Fermi taught mathematical physics and theoretical mechanics at the University of Florence, where he teamed up with Rasetti to conduct a series of experiments on the effects of magnetic fields on mercury vapour.
Split into simpler sentences: From January 1925 to the autumn of 1926, Fermi taught mathematical physics and theoretical mechanics at the University of Florence. Here he teamed up with Rasetti to conduct a series of experiments on the effects of magnetic fields on mercury vapour.