Complex sentence: The second, six-coupled and named "Whistler" was built for the Boston and Providence Rail Road in 1833, later renamed "Massachusetts" was lost in a bog in Mansfield, Massachusetts.
Split into simpler sentences: The second, six-coupled and named "Whistler", was built for the Boston and Providence Rail Road in 1833. It was later renamed "Massachusetts" and was lost in a bog in Mansfield, Massachusetts.