Complex sentence: Between 1969 and 1973 Alfonsas Eidintas studied history at Vilnius Pedagogical University, going on to serve as chief lecturer, docent, head of the Universal History Department, and Deputy Dean at that institution.
Split into simpler sentences: Between 1969 and 1973, Alfonsas Eidintas studied history at Vilnius Pedagogical University. He went to serve as chief lecturer, docent, head of the Universal History Department, and Deputy Dean at that institution.