PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX niao: <http://niao.whu.edu.cn#>
PREFIX oa: <http://www.w3.org/ns/oa#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX iiif: <http://iiif.io/api/image/2.1/#>
SELECT ?name ?plotname ?plotregion WHERE{
   ?i niao:filename ?name.
   ?i niao:hasAnnotation ?a.
   ?a oa:hasBody ?b.
   ?b niao:referTo ?p.
   ?p niao:plotorder ?o.
   ?p niao:name ?plotname.
   ?a oa:hasTarget ?t.
   ?t oa:hasSelector [rdf:value ?plotregion].
}ORDER BY ?o LIMIT 50