Generating provenance-en.ttl using config.properties file leads to unvalid turtle file

[HaydarAk]

Using the widoco.jar with -confFile' parameter and a config.properties file leads to an unvalid provenance-en.ttl turtle file. If I enter an author / contributor to the config.properties file:
authors=John Doe
contributors=Jane Doe

widoco generates a provenance-en.ttl with following lines:

dc:title "someTitle";
prov:wasAttributedTo :agent0;
prov:wasAttributedTo :agent1;

:agent0 a prov:Agent; foaf:name "John Doe".
:agent1 a prov:Agent; foaf:name "Jane Doe".

In my understanding, there should be an underscore _ before :agent0/agent1 to be valid blank nodes, like this:

prov:wasAttributedTo _:agent0;
...
_:agent0 a prov:Agent; foaf:name "John Doe".

Otherwise, it is not a valid turtle.

Tested with Online RDF/Turtle validators as well as the raptor-2 validator

[dgarijo]

Thanks, I will have a look. I think I didn't declare a local namespace