Problem
Write a Pandas script to merge two dataframes on a specific key, handle missing values, and filter the output based on a date condition.
Practicing as: Data Engineer interview at CVS HealthHi, I'll play your CVS Health interviewer for the Data Engineer role. Candidates describe these interviews as mostly positive and moderately difficult, so expect me to be friendly and conversational. Take your time with the question above and answer like we're in the room.
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