Complex sentence: On 11 January 1900, Harrogate Grand Opera House, now Harrogate Theatre opened with a charity gala in aid of British soldiers fighting the Boer War in South Africa followed on 13 January 1900 by Mr J Tully's pantomime, "Dick Whittington".
Split into simpler sentences: On 11 January 1900, Harrogate Grand Opera House, now Harrogate Theatre opened with a charity gala in aid of British soldiers fighting the Boer War in South Africa. This was followed on 13 January 1900 by Mr J Tully's pantomime, "Dick Whittington".