Slice(Distinct(Project(Filter(regex(str(?exact) , "^how|[^a-zA-Z]how[^a-zA-Z]|how$", "i") ,
                              BGP( ?annotation <http://www.w3.org/ns/oa#hasBody> ?entityuri .
                                   ?selector <http://www.w3.org/ns/oa#exact> ?exact .
                                   ?target <http://www.w3.org/ns/oa#hasSelector> ?selector .
                                   ?target <http://www.w3.org/ns/oa#hasSource> ?source .
                                   ?annotation <http://www.w3.org/ns/oa#hasTarget> ?target)),
                       {?exact, ?source, ?entityuri})),
      0,
      100)