Question: Four referendums were held in Switzerland during 1949, the first two were held on 22 May on revising article 39 of which third and current federal constitution of Switzerland?
Sentence (from "Swiss referendums, 1949"): The first two were held on 22 May on revising article 39 of the federal constitution concerning the Swiss National Bank and a federal law amending a 1928 law on measures against tuberculosis, with both rejected by voters.
Relevant evidence: Yes