Question:  Frank Majoor is the Permanent Representative of the Kingdom of the Netherlands to an intergovernmental military alliance between several North American and European states based on a treaty that was signed when?
Sentence (from "NATO"): The North Atlantic Treaty Organization (NATO ; French: "Organisation du Traité de l'Atlantique Nord" ; "OTAN "), also called the North Atlantic Alliance, is an intergovernmental military alliance between several North American and European states based on the North Atlantic Treaty that was signed on 4 April 1949.
Relevant evidence: Yes