Complex sentence: Christopher Pratt was an 11 year old boy when his father died working in the lead mines, one of 13 children Christopher and his family left their cottage in Gunnerside, Swaledale and moved to Bradford looking for work.
Split into simpler sentences: Christopher Pratt was an 11 year old boy when his father died working in the lead mines. One of 13 children, Christopher and his family left their cottage in Gunnerside, Swaledale and moved to Bradford looking for work.