Table: kim hyun - joong
Question: Which Korean network has aired the most television shows featuring Kim Hyun-joong, based on the data in the table?
Step 1 (Operation, Grouping): network
Step 2 (Reasoning, Aggregating): COUNT, network
Step 3 (Reasoning, Aggregating): MAX, network
Step 4 (Operation, Indexing): network
Answer: kbs2