<prompt> Qedela lo musho olandelayo: UKevin Patrick Callan uyisibhuku saseMelika esincintisanayo. Ngo-2017, wanqoba indondo yesiliva emjahweni we-4x200-meter freestyle emidlalweni yamazwe omhlaba.  <response>: Umqhudelwano Wamazwe Omhlaba Wabasha ka-2017. Emidlalweni yama-Olympic asehlobo ka-2020, uCallan wayeyingxenye ye-4x200-meter freestyle relay eyathatha indawo yesine. 