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: En cromatografía de intercambio iónico, el grupo funcional ácido carboxílico se emplea como
Example Output: In ion exchange chromatography, the carboxylic acid functional group is used as

Example Input: Todos los virus RNA (-) presentan
Example Output: All RNA (-) viruses present

Example Input: ¿Qué tipo de aprendizaje se manifiesta sin que exista un refuerzo obvio?
Example Output:
What kind of learning manifests itself without obvious reinforcement?