Complex sentence: Famed conductor Terence Fletcher (J. K. Simmons) walks in on Andrew practicing in the music room late one night and eventually invites him into his studio band as the alternate for core drummer Carl Tanner (Nate Lang).
Split into simpler sentences: Famed conductor Terence Fletcher (J. K. Simmons) walks in on Andrew practicing in the music room late one night. Fletcher eventually invites him into his studio band as the alternate for core drummer Carl Tanner (Nate Lang).