Complex sentence: Bachantka and Naganka had been trained and raced in Poland, Bachantka having a record of 2/15 (0-1-3), and Naganka a record of 2/12 (3-4-1).
Split into simpler sentences: Bachantka and Naganka had been trained and raced in Poland. Bachantka had a record of 2/15 (0-1-3), and Naganka a record of 2/12 (3-4-1).