About: http://dbpedia.org/resource/FFTW/released/Start

Property	Value
dbpprop:startDateProperty	3 (xsd:integer) 24 (xsd:integer) 1997 (xsd:integer)
dbpprop:wikiPageUsesTemplate	dbpedia:Template:start_date
is dbpprop:released of	dbpedia:FFTW

About: http://dbpedia.org/resource/FFTW/released/Start_date