Sentence: 'The National Association Of Mobile Entertainers is pleased to announce the preliminary seminar line up for the second Building for The Future Conference , which will be held at be held at the Ramada Inn Philadelphia Airport South in Essington , Pennsylvania on April 26th , 27th and 28th , 2004 .', Argument/Subject 1: 'conference', Argument/Subject 2: 'philadelphium'
be hold in