 Complete the following phrase:  Belarus sent a total of 8 swimmers at the London games, after having achieved qualifying standards in their respective events up to a maximum of 2 swimmers in each event at the Olympic Qualifying Time OQT, and 1 at the Olympic Selection Time OST: Belarus left London with a remarkable milestone in swimming, winning only two silver medals by Aliaksandra Herasimenia in the womens 50 m freestyle and 