Complex sentence: In 1912,786 km were state property compared to 275 km private lines and full nationalisation was considered, but it took until 1926 when the NMBS/SNCB was started.
Split into simpler sentences: In 1912,786 km were state property compared to 275 km private lines. Full nationalisation was considered a the time, but was never enacted until 1926 when the NMBS/SNCB was started.