He made fun of doctors, college officials,opera singers, diplomats and government officials.

VOA: special.2009.07.19

Opera singers love this.

歌剧演唱家喜欢这个

耶鲁公开课 - 聆听音乐课程节选

Until that night, black singers of classical music had almost no chance of performing in major American opera houses and theaters.

VOA: special.2010.03.07

At that time, however, black singers were not permitted in white opera companies in the United States.

VOA: special.2009.01.25

He knew that black singers in America were not permitted to sing with white opera groups.

VOA: special.2009.01.18

All the other singers in the New York City Opera Company production were white.

VOA: special.2010.03.07