Complex sentence: He wrote and directed the 1996 independent film "The Daytrippers", then concentrated for several years on directing in television for series such as "Undeclared" and "Arrested Development".
Split into simpler sentences: He wrote and directed the 1996 independent film "The Daytrippers" before being introduced to television directing. Since then, he has directed several episodes of "Undeclared" and "Arrested Development".