Donald Lynden-Bell
Donald Lynden-Bell CBE FRS ( 5 April 1935 – 6 February 2018 ) was a British theoretical astrophysicist . 
<triplet> Donald Lynden-Bell <subj> 5 April 1935 <obj> date of birth <subj> 6 February 2018 <obj> date of death <subj> theoretical astrophysicist <obj> field of work