Complex sentence: He returned to Scotland in 1639, and established communications with the Covenanters and the Opposition in England, and as member for Banbury in both the Short and Long Parliaments he took a prominent part in the attacks upon the church.
Split into simpler sentences: He returned to Scotland in 1639, and established communications with the Covenanters and the Opposition in England. As Member of Parliament for Banbury in both the Short and Long Parliaments he took a prominent part in the attacks upon the church.