How many papers did the authors of 'EnvyDepth:  An Interface for Recovering Local Natural Illumination from Environment Maps' publish in 2013?
In 2013, how many papers did the authors of 'EnvyDepth:  An Interface for Recovering Local Natural Illumination from Environment Maps' publish?
SELECT DISTINCT (COUNT(?answer) AS ?count) WHERE { <https://dblp.org/rec/journals/cgf/BanterleCDCPS13> <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#yearOfPublication> '2013' }
<https://dblp.org/rec/journals/cgf/BanterleCDCPS13>