Complex sentence: From the late 1890s to the 1960s, Bell Island was home to an iron ore mine in Wabana operated most recently by the Dominion Steel and Coal Corporation (DOSCO); the ore was shipped to DOSCO's steel mill in Sydney, Nova Scotia.
Split into simpler sentences: From the late 1890s to the 1960s, Bell Island was home to an iron ore mine in Wabana operated most recently by the Dominion Steel and Coal Corporation (DOSCO). The ore was shipped for processing to DOSCO's steel mill in Sydney, Nova Scotia.