ISACreator 1.7 changed the way the content of Comment [Investigation Person URI] is  written; trying to handle both

1.7.x
Comment [Investigation Person URI]	"TBU:U123"

1.6.x
Comment [Investigation Person URI]	"U123"	""	""	""
Comment [Investigation Person URI Term Accession Number]	"Name"	""	""	""
Comment [Investigation Person URI Term Source REF]	"TBU"	""	""	""
more tests
Merge branch 'master' of github.com:ToxBank/isa2rdf