Complex sentence: The Municipal Stadium of Atocha was the second stadium that Real Sociedad had in their history, preceded by Ondarreta, located in the neighborhood of the old town of San Sebastián.
Split into simpler sentences: The Municipal Stadium of Atocha was the second stadium that had the Real Sociedad in their history. It was preceded by Ondarreta, the first field of the Real Sociedad, located in the neighborhood of the old town of San Sebastián.