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Then, in the YellowLine column, extract whether or not a station is on the Yellow Line: Yes if it is on the Yellow Line, and
Then, in the YellowLine column, extract whether or not a station is on the Yellow Line: "Yes" if it is on the Yellow Line, and No if it is not. Hint: Based on the Data Dictionary, a station is on the Yellow line if the first letter of the Lines string is a
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