Complex sentence: It has met at its present Masonic Hall in Sunderland since 1785, receiving its Bi-Centenary Warrant on 5th October 1955 and celebrating its 250th Anniversary on 7th October 2005.
Split into simpler sentences: It has met at its present Masonic Hall in Sunderland since 1785. It received the Bi-Centenary Warrant on 5th October 1955 and celebrated its 250th Anniversary on 7th October 2005.