Simplify the following text for a Grade 10 native English-speaking person.
Original: Harrison was a representative for Surry County , Virginia ( 1756-1758 ) and Charles City County ( 1766-1776 ) to the House of Burgesses .
Simplified: Harrison was a representative for Surry County , Virginia , ( 1756 â `` 1758 ) and Charles City County ( 1766 â `` 1776 ) to the House of Burgesses .