How many different reasons are there for the change in Connecticut (3)?
{'header': ['State (class)', 'Vacator', 'Reason for change', 'Successor', 'Date of successors formal installation'], 'page_title': '', 'section_title': '', 'caption': '', 'rows': [['Georgia (2)', 'James Jackson (DR)', 'Resigned sometime in 1795', 'George Walton (F)', 'Appointed November 16, 1795'], ['Connecticut (1)', 'Oliver Ellsworth (F)', 'Resigned March 8, 1796', 'James Hillhouse (F)', 'Elected March 12, 1796'], ['Massachusetts (2)', 'Caleb Strong (F)', 'Resigned June 1, 1796', 'Theodore Sedgwick (F)', 'Elected June 11, 1796'], ['Massachusetts (1)', 'George Cabot (F)', 'Resigned June 9, 1796', 'Benjamin Goodhue (F)', 'Elected June 11, 1796'], ['Connecticut (3)', 'Jonathan Trumbull, Jr. (F)', 'Resigned June 10, 1796', 'Uriah Tracy (F)', 'Elected October 13, 1796'], ['Tennessee (1)', 'New seat', 'Tennessee was admitted to the Union', 'William Cocke (DR)', 'Elected August 2, 1796'], ['Tennessee (2)', 'New seat', 'Tennessee was admitted to the Union', 'William Blount (DR)', 'Elected August 2, 1796'], ['Vermont (1)', 'Moses Robinson (DR)', 'Resigned October 15, 1796', 'Isaac Tichenor (F)', 'Elected October 18, 1796'], ['Maryland (1)', 'Richard Potts (F)', 'Resigned October 24, 1796', 'John E. Howard (F)', 'Elected November 30, 1796'], ['South Carolina (2)', 'Pierce Butler (DR)', 'Resigned October 25, 1796', 'John Hunter (DR)', 'Elected December 8, 1796']]}