ClassCastException with implicit bundle

[timrdf]

in support of apseyed/SemantGeo#1

semantgeo/source/aeap_nys/dataset/dfw_lake_samples/version/2013-April-24

led to

Exception in thread "main" java.lang.ClassCastException: org.openrdf.model.impl.LiteralImpl cannot be cast to org.openrdf.model.URI
    at edu.rpi.tw.data.csv.CSVtoRDF.visit(CSVtoRDF.java:2746)
    at edu.rpi.tw.data.csv.CSVParser.visitRecords(CSVParser.java:298)
    at edu.rpi.tw.data.csv.CSVtoRDF.toRDF(CSVtoRDF.java:1270)
    at edu.rpi.tw.data.csv.CSVtoRDF.main(CSVtoRDF.java:475)