Question:  Ruud Janssen is a Dutch Fluxus and mail artist currently living in Breda in the Netherlands, also known informally as what?
Sentence (from "Netherlands"): The Netherlands ( ; Dutch: "Nederland" ] ; West Frisian: "Nederlân" ), also known informally as Holland, is a densely populated country in Western Europe, also incorporating three island territories in the Caribbean.
Relevant evidence: Yes