Complex sentence: Crawford was born in Adelaide, the son of Hugh Archibald Crawford (ca.1824--6 October 1881), who took over Mann's Grocery Mart, Hindley Street, Adelaide, in 1852 and specialised in tea and coffee.
Split into simpler sentences: Crawford was born in Adelaide, the son of Hugh Archibald Crawford (ca.1824--6 October 1881). H. A. Crawford took over Mann's Grocery Mart in Hindley Street, Adelaide in 1852 and specialised in tea and coffee.