Complex sentence: María Amelia Baltar, know as Amelita Baltar (Buenos Aires, September 24,1940) is an Argentine tango singer who became famous in the early 1970s when she sang the songs of Ástor Piazzolla and Horacio Ferrer.
Split into simpler sentences: María Amelia Baltar, know as Amelita Baltar (Buenos Aires, September 24,1940) is an Argentine tango singer. Baltar became famous in the early 1970s when she sang the songs of Ástor Piazzolla and Horacio Ferrer.