Complex sentence: Moore married Grant Tinker, a CBS executive (later chairman of NBC), in 1962, and in 1970 they formed the television production company MTM Enterprises, which created and produced the company's first television series, "The Mary Tyler Moore Show".
Split into simpler sentences: Moore married Grant Tinker, a CBS executive (later chairman of NBC), in 1962. In 1970 they formed the television production company MTM Enterprises, which created and produced the company's first television series, "The Mary Tyler Moore Show".