Sinsen Line
... that the Oslo Tramway reached its greatest length with the opening of the Sinsen Line in 1939?
... that the <a class="mw-redirect" href="./Oslo_Tramway" id="mwCzw" rel="mw:WikiLink" title="Oslo Tramway">Oslo Tramway</a> reached its greatest length with the opening of the <b id="mwCz0"><a href="./Sinsen_Line" id="mwCz4" rel="mw:WikiLink" title="Sinsen Line">Sinsen Line</a></b> in 1939?