Complex sentence: Motley was successful in nine of the ten cases she argued before the Supreme Court, and was otherwise a key legal strategist in the civil rights movement, helping to desegregate Southern schools, buses, and lunch counters.
Split into simpler sentences: Motley was successful in nine of the ten cases she argued before the Supreme Court. She was otherwise a key legal strategist in the civil rights movement, helping to desegregate Southern schools, buses, and lunch counters.