Complex sentence: Martin Johnson the international adventurer and filmmaker, died the next day in hospital of a fractured skull, but although his wife Osa suffered back and neck injuries she continued with the couple's lecture circuit despite being confined to a wheelchair.
Split into simpler sentences: Martin Johnson the international adventurer and filmmaker, died the next day in hospital of a fractured skull. His wife Osa suffered back and neck injuries but continued with the couple's lecture circuit despite being confined to a wheelchair.