Teacher:In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Teacher: Now, understand the problem? Solve this instance: Passage: He was the son of a merchant, Adolf Abraham Eisenberg, and Ester nee Spiro. After finishing Sobieski Gymnasium in Krakow he studied medicine at the Jagiellonian University, where he obtained his PhD in medical studies in 1899. He then conducted postgraduate work in Vienna with Richard Paltauf and between 1901 and 1902 served as a research assistant to Odo Bujwid. Subsequently he worked in Paris, at the Pasteur Institute and then in Wrocaw (Breslau) under the direction of Richard Pfeiffer. Between 1919 and 1920 he was the head of a Military Hospital in Warsaw. In 1933 he became the director of the National Bacteriology Station in Krakow, a position he held until 1939. Until 1941 he was the head of the Institute of Medical Microbiology in Lwow (L'viv).
Link Information: Richard Paltauf (9 February 1858 21 April 1924) Answer: 43
Student:
How old was Richard when Filip began working with him?