Complex sentence: Asda is an abbreviation of Asquith and Dairies, often capitalised, although there is some controversy about whether the name was "Associated" and "Dairies" merged, as opposed to Asquith.
Split into simpler sentences: Asda is an abbreviation of Asquith and Dairies, often capitalised. Although there is some controversy about whether the name was "Associated" and "Dairies" which were merged as opposed to Asquith.