Table: list of nurses episodes
Question: What is the ratio of episodes directed by Robert Berlinger to the episodes directed by Lax Passaris?
Step 1 (Operation, Filter): directed by
Step 2 (Reasoning, Other Commonsense Reasoning): episodes
Step 3 (Operation, Grouping): directed by
Step 4 (Reasoning, Other Commonsense Reasoning): ratio
Answer: 15:2