Question: What song, originally composed by Pyotr Ilyich Tchaikovsky, was performed by Elizabeth de la Porte in South Africa? 
Sentence (from "Elizabeth de la Porte"): Elizabeth de la Porte was born at Johannesburg in South Africa on 15 September 1941, the daughter of William James Tomlinson and his wife, the singer Betsy de la Porte.
Relevant evidence: No