Extract the beginning and ending term of António de Serpa Pimentel from the following text

Context: António de Serpa Pimentel was Prime Minister of Portugal from 14 January to 11 October 1890. His term in office began as a reaction to the British ultimatum concerning Portuguese colonial policy in southeast Africa. The signing of the Anglo-Portuguese Treaty later that year, which was intended as a step to resolve the crisis, was viewed as further appeasement of a powerful Britain. This led to his resignation and the fall of his government.

Answer: António de Serpa Pimentel was the Prime Minister of Portugal from 14 January 1890 to 11 October 1890