_:vb50960668 "28" . _:vb50960669 "28" . _:vb50960669 . _:vb50960668 _:vb50960669 . _:vb50960668 _:vb50960670 . _:vb50960670 "28" . _:vb50960670 "Least_Developed_Countries__LDC_" .