Complex sentence: As a teenager he was apprenticed to Sir Edward Coke (1552--1634), the famous jurist, and under Coke's patronage, Williams was educated at Charterhouse and also at Pembroke College, Cambridge (B.A., 1627).
Split into simpler sentences: As a teenager he was apprenticed to Sir Edward Coke (1552--1634), the famous jurist. Under Coke's patronage, Williams was educated at Charterhouse and also at Pembroke College, Cambridge (B.A., 1627).