How many episodes had a title "the great mayoralty campaign"?
{'header': ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code'], 'page_title': '', 'section_title': '', 'caption': '', 'rows': [['145', '1', '"The City Kids"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'September15,1970', '146'], ['146', '2', '"The Coming-Out Party"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'September22,1970', '147'], ['147', '3', '"Jealousy"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'September29,1970', '145'], ['148', '4', '"A Royal Love Story"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'October6,1970', '149'], ['149', '5', '"Oliver Goes Broke"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'October20,1970', '150'], ['150', '6', '"The Great Mayoralty Campaign"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'October27,1970', '156'], ['151', '7', '"Eb\'s Double Trouble"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'November10,1970', '148'], ['152', '8', '"Apple-Picking Time"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'November17,1970', '151'], ['153', '9', '"Enterprising Eb"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'November24,1970', '152'], ['154', '10', '"Oliver\'s Double"', 'Richard L. Bare', 'Dan Beaumont', 'December1,1970', '153'], ['155', '11', '"The High Cost of Loving"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'December8,1970', '154'], ['156', '12', '"The Liberation Movement"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'December15,1970', '155'], ['157', '13', '"Charlie, Homer and Natasha"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'December22,1970', '157'], ['158', '14', '"The Engagement Ring"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'December29,1970', '158'], ['159', '15', '"The Free Paint Job"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'January5,1971', '159'], ['160', '16', '"Son of Drobny"', 'Richard L. Bare', 'Dan Beaumont', 'January12,1971', '160'], ['161', '17', '"The Wedding Deal"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'January19,1971', '164'], ['162', '18', '"Star Witness"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'January26,1971', '163'], ['163', '19', '"The Spot Remover"', 'Richard L. Bare', 'Dan Beaumont', 'February2,1971', '166'], ['164', '20', '"King Oliver I"', 'Richard L. Bare', 'Jay Sommers and Dick Chevillat', 'February9,1971', '170'], ['165', '21', '"A Girl for Drobny"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'February16,1971', '167'], ['166', '22', '"The Carpenter\'s Ball"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'February23,1971', '162'], ['167', '23', '"The Hole in the Porch"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'March2,1971', '168'], ['168', '24', '"Lisa the Psychologist"', 'Richard L. Bare', 'Dick Chevillat and Dan Beaumont', 'March9,1971', '161'], ['169', '25', '"Hawaiian Honeymoon"', 'Vincent Sherman', 'Jay Sommers', 'March16,1971', '165']]}