Identify the crew?

Regarding the Titanic set.  Does anyone know a good way to distinguish crew members versus passengers?  I noticed the wikipedia says that disproportionate numbers of crew members who embarked from Southampton died. Some hypothetical possibilities to find who were the crew members versus the passengers: – Ticket number. Maybe it is missing, or a special ticket number. – City (embarked). Maybe the crew all got on at Southampton? – Fare. Maybe the fare is missing, or a special value. – Number of siblings aboard. Maybe it is always zero? Obviously this would not be sufficient, but might be of assistance. – Number of parents aboard. It might be like siblings. – Cabin.  Maybe it is missing, or a special value or special range of values. – Pclass. Maybe it is…


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