Simplify the following text for a Grade 7 native English-speaking person.
Original: Elsa Einstein , ( 18 January , 1876 - 20 December , 1936 ) , was the second wife and cousin of the German phyicist , Albert Einstein .
Simplified: Elsa Einstein ( January 18 , 1876 â `` December 20 , 1936 ) was a German cousin and the second wife of Albert Einstein .