Kolkata Metro
... that India's first metro, the Kolkata Metro, was first proposed in 1919 but became operational only in 1984?
... that India's first metro, the <b id="mw2w"><a href="./Kolkata_Metro" id="mw3A" rel="mw:WikiLink" title="Kolkata Metro">Kolkata Metro</a></b>, was first proposed in 1919 but became operational only in 1984?