 Complete the following phrase:  Lobke Berkhout born 11 November 1980 in Amsterdam is a sailor from the Netherlands who represented her country at the 2008 Summer Olympics in Qingdao. With helmsman Marcelien de Koning Berkhout took the Silver medal as crew in the Womens 470. Berkhout returned as crew member to the 2012 Olympic regattas in Weymouth in the 470. With helmsman Lisa Westerhof Berkhout took the Bronze medal in the 