Complex sentence: After time spent in local party cells in Wakefield and Malden, Massachusetts, he received training in the fundamentals of Marxism-Leninism and worked for the Party in a variety of front groups.
Split into simpler sentences: After time spent in local party cells in Wakefield and Malden, Massachusetts. He received training in the fundamentals of Marxism-Leninism and worked for the Party in a variety of front groups.