Complex sentence: Sophia was Queen of Sweden for 35 years, longer than any other Swedish queen consort before her, and a record she held until 2011 when she was surpassed by the current Queen Silvia.
Split into simpler sentences: Sophia was Queen of Sweden for 35 years, longer than any other Swedish queen consort before her. She was the longest serving queen consort until 2011 when she was surpassed by the current Queen Silvia.