Complex sentence: The city of Novosibirsk has a population of 1.5 million people and was founded as a junction city between the main transfer arteries in Siberia, the Trans-Siberian railway and the river Ob.
Split into simpler sentences: The city of Novosibirsk has a population of 1.5 million people and was founded as a junction city between the main transfer arteries in Siberia. The Trans-Siberian railway and the river Ob.