Complex sentence: Born in Warsaw, Poland which was a part of Imperial Russia, Roberti was the daughter of a clown and as a child performed in the circus as a trapeze artist, and as a vaudeville singer.
Split into simpler sentences: Born in Warsaw, Poland which was a part of Imperial Russia, Roberti was the daughter of a clown. As a child she performed in the circus as a trapeze artist, and was a vaudeville singer.