Complex sentence: When Hayne was nine, he began taking fiddle lessons from his grandmother's cousin, a man named Ted Locke, from whom he took lessons on the fiddle for two years, after which he took up the mandolin.
Split into simpler sentences: When Hayne was nine, he began taking fiddle lessons from his grandmother's cousin, a man named Ted Locke. He studied the fiddle, for two years, after which he took up the mandolin.