Задание №56041 ЕГЭ Английскому языку

Преобразуйте, если это необходимо, слово RESEARCH так, чтобы оно грамматически и лексически соответствовало тексту.

In 1929, Alexander Fleming, a doctor and a ________________________ published a paper on a chemical he called "penicillin", which he had received from a fungi. He became the first person who found out that penicillin may kill bacteria.