MELBOURNE, AUSTRALIA - JANUARY 31 : Australian Opposition Leader Bill Shorten says a marriage equality bill would pass if it were presented in federal parliament this week when addressing the press as a rainbow flag is waved in the background during the MidSumma festival Pride march conducted by the lesbian, gay, bisexual, transgender and intersex (LGBTI) communities of Melbourne calling for marriage equality. St Kilda, Australia January 31 2016