Complex sentence: Fortunately, when she was nine years old, Mason found a mentor in Focal Point Dance Studios owner Amanda Tae, who was impressed by Mason's "discipline and drive" as she studied in Tae's studio.
Split into simpler sentences: Fortunately, when she was nine years old, Mason found a mentor in the owner of Focal Point Dance Studios Ms. Amanda Tae. Tae states that she was impressed by the amount of "discipline and drive" Mason exhibited during the time she studied in Tae's studio.