Complex sentence: On 26 August 2003, Celia Kitzinger and Sue Wilkinson, both British university professors, legally married in British Columbia, Canada, however on their return their marriage was not recognised under British law.
Split into simpler sentences: On 26 August 2003, Celia Kitzinger and Sue Wilkinson, both British university professors, legally married in British Columbia, Canada. However, on their return their marriage was not recognised under British law.