<prompt> Pedzisa mutsara unotevera: Ukulele yeharp yakaoneka muma1910, apo gitare reharp rakanga richiri kufarirwa, uye ukulele yakanga ichangotanga kufarirwa munyika yose muUnited States nemhaka yokushandiswa kwayo pamitambo  <response>: Panama Pacific International Exposition ya1915. 