Britain's first national anti-slavery society for women
... that Clementia Taylor formed Britain's first national anti-slavery society for women because she could not join the existing organisation?
... that Clementia Taylor formed <b id="mwApc"><a href="./Ladies'_London_Emancipation_Society" id="mwApg" rel="mw:WikiLink" title="Ladies' London Emancipation Society">Britain's first national anti-slavery society for women</a></b> because she could not join the existing organisation?