Complex sentence: She was built at Hamburg and was launched on 10 June 1911 and commissioned on 15 October 1912, when she became the flagship of the "Hochseeflotte" ("High Seas Fleet") until 14 March 1917, participating in the Battle of Jutland.
Split into simpler sentences: She was built at Hamburg, launched on 10 June 1911, and commissioned on 15 October 1912. She became the flagship of the "Hochseeflotte" ("High Seas Fleet") until 14 March 1917, participating in the Battle of Jutland.