Complex sentence: Among the Polish soldiers killed in the battle was 19-year-old Konstanty Zarugiewicz, a student of the 7th course of primary school and a veteran of the 1918 defence of Lwów, for which he was awarded with Virtuti Militari and Krzyż Walecznych.
Split into simpler sentences: Among the Polish soldiers killed in the battle was 19 years old Konstanty Zarugiewicz. A student of the 7th course of primary school and a veteran of the 1918 defence of Lwów, for which he was awarded with Virtuti Militari and Krzyż Walecznych.