Table: united states house of representatives elections , 1948
[['district', 'incumbent', 'party', 'first elected', 'result', 'candidates'], ['california 2', 'clair engle', 'democratic', '1943', 're - elected', 'clair engle (d) unopposed'], ['california 5', 'richard j welch', 'republican', '1926', 're - elected', 'richard j welch (r) unopposed'], ['california 6', 'george paul miller', 'democratic', '1944', 're - elected', 'george paul miller (d) unopposed'], ['california 13', 'norris poulson', 'republican', '1946', 're - elected', 'norris poulson (r) 52.6% ned r healy (d) 47.4%'], ['california 17', 'cecil r king', 'democratic', '1942', 're - elected', 'cecil r king (d) unopposed']]
Statement: 4 Incumbent 's ran Unopposed
Statement: there are 3 democrat 's and 2 Republican
Statement: the Incumbent from California 5 District was First Elected before the Incumbent from California 17 District
Statement: none of the 5 Incumbent 's were First Elected in the same year
Statement: the Incumbent in the earliest First Elected year was First Elected 20 year before the First Elected in the latest year