@who data.pointer
currently the value of @who is not a data.pointer, see: https://www.tei-c.org/release/doc/tei-p5-doc/en/html/ref-att.ascribed.html
currently the value of @who is not a data.pointer, see: https://www.tei-c.org/release/doc/tei-p5-doc/en/html/ref-att.ascribed.html