TASK DEFINITION: In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.
PROBLEM: El principal factor de crecimiento autocrino para la mayoría de linfocitos T tras el reconocimiento del antígeno es

SOLUTION: The main autocrine growth factor for most T lymphocytes after antigen recognition is

PROBLEM: Los reactivos de Grignard atacan a los epóxidos para dar, tras la oportuna hidrólisis

SOLUTION: The Grignard reagents attack the epoxides to give, after the appropriate hydrolysis

PROBLEM: La Ley de Bases de la Sanidad Nacional de 1944 estableció con carácter obligatorio

SOLUTION:
The Law of Bases of the National Health of 1944 established with obligatory character