context: Higgins was born in Boston, Massachusetts, where he attended the public schools and graduated from Harvard University in 1917.
source: Returning to civilian life, Higgins was employed as a chemist from 1919 until 1922.
reference_original: Al volver a la vida civil, Higgins fue contratado como químico de 1919 a 1922.
reference_flipped: Al volver a la vida civil, Higgins fue contratada como química de 1919 a 1922.