Complex sentence: Jelinek senior, a dentist, had planned early for an escape to England, arranging for a passport, visa, and the shipping of his dentistry materials; the couple planned to send their son to an English private school.
Split into simpler sentences: Jelinek senior, a dentist, had planned early for an escape to England; he arranged for a passport, visa, and the shipping of his dentistry materials. The couple planned to send their son to an English private school.