Which author named Bill published the paper on Life issue?
Which author published the paper on Life issue and has the name Stevenson?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/crossroads/Stevenson01a> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/journals/crossroads/Stevenson01a>