Leo Kanner
Leo Kanner ( ; June 13 , 1894 – April 3 , 1981 ) was an Ukrainian-Austrian-American psychiatrist , physician , and social activist best known for his work related to autism . 
<triplet> Leo Kanner <subj> June 13, 1894 <obj> date of birth <subj> April 3, 1981 <obj> date of death