Find the papers written by Ryo Hayakawa and Nakai-Kasai, Ayano together.
Which papers did Ryo H. and Nakai-Kasai, Ayano write together?
SELECT DISTINCT ?answer WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/146/1419> . ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/214/2262> }
<https://dblp.org/pid/146/1419> <https://dblp.org/pid/214/2262>