@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix ex: <http://example.org/shacl-test/> .

ex:s1 a sh:NodeShape ;
  sh:targetNode ex:i ;
  sh:property ex:s2 ;
  sh:property ex:s3 .

ex:s2 sh:path ex:p ;
  sh:property ex:s4 .

ex:s3 sh:path ex:q ;
  sh:property ex:s4 .

ex:s4 sh:path ex:r ;
  sh:class ex:C .