<prompt> Qedela umusho olandelayo: U-Yana Valeryevna Martynova ; owazalwa ngoFebhuwari 3, 1988, eKazan ungumbhukudi waseRussia oncintisana emjahweni wabesifazane ongu-400m womuntu ngamunye. Emidlalweni yama-Olympic asehlobo ka-2004 waqhudelana emncintiswaneni wabesifazane wamamitha angama-400 womuntu ngamunye, waqeda endaweni yama-21. Emidlalweni yama-Olympic ka-2008, waqhudelana emncintiswaneni we-400 m womuntu ngamunye kanye ne-200 m butterfly. Wafinyelela kowamanqamu emncintiswaneni wamasondo angu-400. Emidlalweni yama-Olympic asehlobo ka-2012 waqeda endaweni yama-24 jikelele emidlalweni yama-Olympic asehlobo.  <response>: I-medley yabesifazane yamamitha angu-400 futhi yehluleka ukufinyelela kowamanqamu. 