Dean Family Farm
The Dean Family Farm , listed since 1975 as a historic site on the National Register of Historic Places , has its origins with the immigration of Daniel Dean , a native of Tobermore , County Londonderry , Ireland , to Philadelphia , Pennsylvania , in 1784 when he was aged 18 , according to Dean family histories . 
<triplet> Tobermore <subj> County Londonderry <obj> historic county