Complex sentence: Insurgentes has its origins in what was during the early 20th century known as the Via del Centernario, commemorating 100 years of Independence which ran from city centre to the southern suburbs.
Split into simpler sentences: Insurgentes has its origins during the early 20th century, when it was named the Via del Centenario, ("Centennial Way") to commemorate 100 years of independence. At the time, it ran from city centre to the southern suburbs.