Takes the contents of the Instance array and creates a new Instance object
whose attributes are the attributes of the Instance objects in sequence
backed by a new Dataset relfecting the new set of attributes.
This class parses bibtex files generated by a custom group of perl scripts
that take as input the comma seperated files from www.ismir.net, then reads
the xml version of the papers (pdftohtml) to determine which ismir papers
reference which other papers.