Simplify the following text for a Grade 12 native English-speaking person.
Original: Harty did most of his composing between 1901 and 1920 , including his Irish Symphony , his tone poem With the Wild Geese , his Violin Concerto , and his setting of Ode to a Nightingale for soprano and orchestra , premiered by Nicholls .
Simplified: Harty composed many pieces during his early years , including An Irish Symphony , a tone poem With the Wild Geese , a Violin Concerto , and Ode to a Nightingale .