Complex sentence: The first ghetto was the Latvian ghetto, sometimes called the "Big Ghetto", which was only in existence for 35 days, from late October to 30 November 1941.
Split into simpler sentences: The first ghetto was the Latvian ghetto, sometimes called the "Big Ghetto". This ghetto was only in existence for 35 days, from late October to 30 November 1941.