Table:
text: United States House of Representatives elections, 1964
Pennsylvania
Pennsylvania
District Incumbent Party First_elected Result_ Candidates
Pennsylvania 4 Herman Toll Democratic 1958 Re-elected Herman Toll (D) 64.1% James R. Cavanaugh (R) 35.9%
Pennsylvania 7 William H. Milliken, Jr. Republican 1958 Retired Republican hold George Watkins (R) 51.1% Leonard Bachman (D) 48.9%
Pennsylvania 9 Paul B. Dague Republican 1946 Re-elected Paul B. Dague (R) 57.7% John A. O`Brien (D) 42.3%
Pennsylvania 20 Elmer J. Holland Democratic 1956 Re-elected Elmer J. Holland (D) 74.4% Ronald Bryan (R) 25.6%
Pennsylvania 23 Albert W. Johnson Republican 1963 Re-elected Albert W. Johnson (R) 54.9% John Still (D) 45.1%
Pennsylvania 25 Frank M. Clark Democratic 1954 Re-elected Frank M. Clark (D) 70.3% John Loth (R) 29.7%

Question: What is incumbent Albert W. Johnson's district of the United States House of Representatives election, 1964 "Pennsylvania"?

Question: How many times was Frank M. Clark the incumbent in the United States House of Representatives election, 1964 Pennsylvania?

Question: Which district does incumbent elmer j. Holland from the Pennsylvania United States House of Representatives elections, 1964 ?