Horace Wells
Horace Wells ( January 21 , 1815 – January 24 , 1848 ) was an American dentist who pioneered the use of anesthesia in dentistry , specifically nitrous oxide ( or laughing gas ) . 
<triplet> Horace Wells <subj> January 21, 1815 <obj> date of birth <subj> January 24, 1848 <obj> date of death