Complex sentence: At the Academy he won the Sterndale Bennett and Thalberg scholarships, and also the Hine Prize and the Chappell gold medal for pianoforte playing, and in 1909, at the age of 17, he became the youngest subprofessor yet appointed to the Academy.
Split into simpler sentences: At the Academy he won the Sterndale Bennett and Thalberg scholarships, and also the Hine Prize and the Chappell gold medal for pianoforte playing. In 1909, at the age of 17, he became the youngest subprofessor yet appointed to the Academy.