Mention the papers published by Michael Beetz with the author from University of Bremen, Germany.
Which publications did Michael Beetz write with the author from University of Bremen, Germany?
SELECT DISTINCT ?answer WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/b/MichaelBeetz> . ?answer <https://dblp.org/rdf/schema#authoredBy> ?y . ?y <https://dblp.org/rdf/schema#primaryAffiliation> 'University of Bremen, Germany' }
<https://dblp.org/pid/b/MichaelBeetz>