Nature sounds (the fonoteca)

Species	Common name	Country	+2
Acrocephalus arundinaceus (Li…	Great Reed Warbler	Spain	…
Acrocephalus schoenobaenus (L…	Sedge Warbler	United Kingdom of Gre…	…
Acrocephalus scirpaceus (Herm…	Eurasian Reed Warbler	Spain	…
Acrocephalus stentoreus (Hemp…	Clamorous Reed Warbler	India	…

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The query

PREFIX class: <https://bioexplora.cat/class/> PREFIX dwc: <http://rs.tdwg.org/dwc/terms/> PREFIX p: <https://bioexplora.cat/prop/> SELECT ?species ?common ?country ?recordist ?audio WHERE { ?r a class:Recording ; dwc:scientificName ?species ; p:audio ?audio . OPTIONAL { ?r dwc:vernacularName ?common } OPTIONAL { ?r dwc:country ?country } OPTIONAL { ?r dwc:recordedBy ?recordist } } LIMIT 40

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