Simplify the following text for a Grade 4 native English-speaking person.
Original: To others , however , bel canto became the vanished art of elegant , refined , sweet-toned musical utterance . Rossini lamented in a conversation that took place in Paris in 1858 that : `` Alas for us , we have lost our bel canto '' .
Simplified: The term `` bel canto '' was not used at the time .