Complex sentence: Alberto Julio Rayneri Alonso (22 May 1917-31 December 2007) was a Cuban dancer and choreographer, the brother of Fernando Alonso and brother-in-law of Alicia Alonso (née Martinez).
Split into simpler sentences: Alberto Julio Rayneri Alonso; (22 May 1917-31 December 2007). Brother of Fernando Alonso, and brother-in-law of Alicia Alonso (née Martinez).