Reconstructing a conversion into an RDFa table

PREFIX dcterms:    <http://purl.org/dc/terms/>
PREFIX conversion: <http://purl.org/twc/vocab/conversion/>
PREFIX ov:         <http://open.vocab.org/terms/>

SELECT ?row ?col ?s ?p ?o
WHERE {
  GRAPH <http://logd.tw.rpi.edu/source/epa-gov-mcmahon-ethan/dataset/environmental-reports/version/2011-Jan-12>  {
    ?s dcterms:isReferencedBy 
       <http://logd.tw.rpi.edu/source/epa-gov-mcmahon-ethan/dataset/environmental-reports/enviro-reports-and-indicators>;
       ov:csvRow ?row; 
       ?p ?o .
    ?p ov:csvCol ?col .
    optional { ?p conversion:enhancement_layer ?e } filter(!bound(?e))
    filter(?row > 0 and ?row < 50)
  }
} ORDER BY ?row ?col ?s ?p ?o