Which author named Guillen published the paper on Carbon monoxide?
Name the author who published the paper on Carbon monoxide and has the name Trinidad.
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/sensors/Guillen-Bonilla18> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/journals/sensors/Guillen-Bonilla18>