Complex sentence: Geens studied at UFSIA and the KU Leuven, where he received his law degree in 1980 and at Harvard University where he received an LL.M. Since 1986 Geens has become a professor at the KU Leuven.
Split into simpler sentences: Geens studied at UFSIA and the KU Leuven, where he received his law degree in 1980. Later, Geens studied at Harvard University where he received an LL.M. Since 1986 Geens has become a professor at the KU Leuven.