In 1814 , William became briefly engaged with Princess Charlotte of Wales , only daughter of the Prince Regent , later George IV of the United Kingdom and his estranged wife Caroline of Brunswick .
Head entity: prince regent Q130586 17 18
Tail entity: princess charlotte of wales Q132440 8 9 10 11
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40