Lockdown (2009)
Lockdown ( 2009 ) was a professional wrestling pay-per-view ( PPV ) event produced by the Total Nonstop Action Wrestling ( TNA ) promotion , which took place on April 19 , 2009 at the Liacouras Center in Philadelphia , Pennsylvania . 
<triplet> Lockdown (2009) <subj> professional wrestling <obj> sport <triplet> Total Nonstop Action Wrestling <subj> professional wrestling <obj> industry <subj> promotion <obj> instance of <triplet> promotion <subj> professional wrestling <obj> sport <triplet> Liacouras Center <subj> Philadelphia, Pennsylvania <obj> located in the administrative territorial entity