Arnold Blackner
... that Arnold Blackner was said to be the first person to sing over 3,000 miles (4,800 km) on the telephone?
... that <b id="mwA9o"><a href="./Arnold_Blackner" id="mwA9s" rel="mw:WikiLink" title="Arnold Blackner">Arnold Blackner</a></b> was said to be the first person to sing over <span about="#mwt47" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"3000"},"2":{"wt":"mi"}},"i":0}}]}' id="mwA9w" typeof="mw:Transclusion">3,000 miles (4,800</span><span about="#mwt47" typeof="mw:Entity"> </span><span about="#mwt47">km)</span> on the telephone?