Question: Don Balfour was a member of which upper house of the Georgia General Assembly?

Context paragraphs:
150th Georgia General Assembly: The 150th General Assembly of the U.S. state of Georgia convened its first session on January 12, 2009, at the Georgia State Capitol in Atlanta, Georgia.  The 150th Georgia General Assembly succeeded the 149th and will serve as the precedent for the 151st General Assembly in 2011.

138th Georgia General Assembly: The 138th General Assembly of the U.S. state of Georgia convened its first session on January 7, 1985, at the Georgia State Capitol in Atlanta.  The 138th Georgia General Assembly succeeded the 137th and served as the precedent for the 139th General Assembly in 1987.

1st Georgia General Assembly: The Georgia General Assembly first started in 1751, but wasn't active until 1777, when Georgia became one of the Thirteen Colonies and broke away from Great Britain.  The 2nd Georgia General Assembly followed two years later.  It took place sometime in January, in Savannah, which was the capital of Georgia at the time.  The capital was moved to its present location, Atlanta, in 1868.  The Assembly has been held once every two years starting in 1777.  The Assembly elected the Georgia House of Representatives and Georgia Senate.

139th Georgia General Assembly: The 139th General Assembly of the U.S. state of Georgia convened its first session on January 12, 1987, at the Georgia State Capitol in Atlanta.  The 139th Georgia General Assembly succeeded the 138th and served as the precedent for the 140th General Assembly in 1989.

Don Balfour (politician): Donald Kenneth Balfour II is a Republican politician.  He was a member of the Georgia State Senate, representing the 9th District.

135th Georgia General Assembly: The 135th General Assembly of the U.S. state of Georgia convened its first session on January 8, 1979, at the Georgia State Capitol in Atlanta.  The 135th Georgia General Assembly succeeded the 134th and served as the precedent for the 136th General Assembly in 1981.

140th Georgia General Assembly: The 140th Georgia General Assembly succeeded the 139th and served as the precedent for the 141st General Assembly in 1991.  The 140th General Assembly of the U.S. state of Georgia convened its first session on January 9, 1989, at the Georgia State Capitol in Atlanta.

134th Georgia General Assembly: The 134th General Assembly of the U.S. state of Georgia convened its first session on January 10, 1977, at the Georgia State Capitol in Atlanta.  The 134th Georgia General Assembly succeeded the 133rd and served as the precedent for the 135th General Assembly in 1979.

Georgia State Senate: The Georgia State Senate is the upper house of the Georgia General Assembly (the state legislature of Georgia, USA).

Georgia General Assembly elections, 2010: The 2010 Georgia General Assembly elections occurred on November 2, 2010 to elect the members to the Georgia State Senate and Georgia House of Representatives.  All fifty-six seats in the state Senate and all 180 seats in the state House were up for two year terms.  The winners of this election cycle served in the 151st Georgia General Assembly.

Supporting paragraphs: Don Balfour (politician) Georgia State Senate
Answer: Georgia State Senate