Leon Eisenberg
Leon Eisenberg , ( August 8 , 1922 – September 15 , 2009 ) was an American child psychiatrist , social psychiatrist and medical educator who "transformed child psychiatry by advocating research into developmental problems" 
<triplet> Leon Eisenberg <subj> August 8, 1922 <obj> date of birth <subj> September 15, 2009 <obj> date of death