Instruction: Given a DataFrame with multiple columns, use the .query() method to filter rows based on a complex condition that involves multiple columns.
Context: This question tests the candidate's knowledge of the advanced data filtering capabilities of Pandas. The candidate should demonstrate how to use the .query() method efficiently to filter data based on conditions that involve more than one column. Examples could include comparing columns to each other, using logical operators, or incorporating external variables within the query. The response should include a clear explanation of the .query() syntax and its advantages over traditional filtering methods.
medium
hard
hard
hard
hard