Complex sentence: María Amelia Baltar, known as Amelita Baltar (Buenos Aires, September 24,1940) is an Argentine tango singer who became famous in the early 1970s as a vocalist for composers and bandoneónists Ástor Piazzolla and Horacio Ferrer.
Split into simpler sentences: María Amelia Baltar, known as Amelita Baltar (September 24,1940) is an Argentine tango singer. Baltar was born in Buenos Aires, and became famous in the early 1970s as a vocalist for composers and bandoneónists Ástor Piazzolla and Horacio Ferrer.