What is the party for richard j. welch?
{'header': ['District', 'Incumbent', 'Party', 'Elected', 'Result', 'Candidates'], 'page_title': '', 'section_title': '', 'caption': '', 'rows': [['California 1', 'Clarence F. Lea', 'Democratic', '1916', 'Re-elected', 'Clarence F. Lea (D) (unopposed)'], ['California 2', 'Harry Lane Englebright', 'Republican', '1926', 'Re-elected', 'Harry Lane Englebright (R) (unopposed)'], ['California 3', 'Charles F. Curry, Jr.', 'Republican', '1930', 'Lost-re-election Democratic gain', 'Frank H. Buck (D) 56.8% Charles F. Curry (R) 43.2%'], ['California 5', 'Richard J. Welch', 'Republican', '1926', 'Re-elected', 'Richard J. Welch (R) (unopposed)'], ['California 6', 'Albert E. Carter', 'Republican', '1924', 'Re-elected', 'Albert E. Carter (R) (unopposed)'], ['California 8', 'Arthur M. Free', 'Republican', '1920', 'Lost-re-election Democratic gain', 'John J. McGrath (D) 56.9% Arthur M. Free (R) 43.1%']]}