Third Avenue/125th Street Line
... that when the Third Avenue/125th Street Line was extended across Manhattan, it was celebrated with a seven-day carnival in Harlem?
... that when the <b id="mwBQ8"><a class="mw-redirect" href="./Bx15_(New_York_City_bus)" id="mwBRA" rel="mw:WikiLink" title="Bx15 (New York City bus)">Third Avenue/125th<span id="mwBRE" typeof="mw:Entity"> </span>Street Line</a></b> was extended across <a href="./Manhattan" id="mwBRI" rel="mw:WikiLink" title="Manhattan">Manhattan</a>, it was celebrated with a seven-day carnival in <a href="./Harlem" id="mwBRM" rel="mw:WikiLink" title="Harlem">Harlem</a>?