context: As Professor of Painting at the Royal Academy he gave a memorable series of lectures to the students of the Schools, published as Six Lectures on Painting (1904) and Aims and Ideals in Art (1906).
source: Clausen was an official war artist during World War I.
reference_original: Во время Первой мировой войны Клаузен был штатным военным художником.
reference_flipped: Во время Первой мировой войны Клаузен была штатной военной художницей.