1802 boundaries were used also in the general elections of 1806 , 1807 , 1812 , 1818 , 1820 , 1826 , 1830 and 1831 .
Head entity: 1820 Q580228 18
Tail entity: 1826 Q623211 20
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156