In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.

Example Input: El óxido ferroso, conocido como wustita (FeO) es no estequiométrico debido a que contiene
Example Output: Ferrous oxide, known as wustite (FeO) is non-stoichiometric because it contains

Example Input: Las células del nodo sinusal presentan
Example Output: The cells of the sinus node present

Example Input: Diferentes citoquinas inducen el cambio de isotipo de las diferentes clases de anticuerpos. De las siguientes parejas de citoquina/isotipo, escoja la correcta
Example Output:
Different cytokines induce the isotype change of the different classes of antibodies. Of the following cytokine / isotype pairs, choose the correct one