Victorian-era
... that only 45 per cent of babies born in 1851 in Victorian-era Liverpool, England, lived to be 20 years old?
... that only 45 per cent of babies born in 1851 in <b id="mwBSA"><a href="./Victorian_era" id="mwBSE" rel="mw:WikiLink" title="Victorian era">Victorian-era</a></b> <a href="./Liverpool" id="mwBSI" rel="mw:WikiLink" title="Liverpool">Liverpool</a>, England, lived to be 20 years old?