Complex sentence: At approximately 9:30 pm Woo shot his first victim outside the police station in Kungryu (궁류) and then entered the local post office, where he killed three phone operators and cut off the telephone lines to prevent others from calling emergency services.
Split into simpler sentences: At approximately 9:30 p.m., Woo shot his first victim, who was standing outside the police station in Kungryu (궁류). He then entered the local post office, where he killed three phone operators and cut off the telephone lines to prevent others from calling emergency services.