[['type', 'owns', 'length', 'delivery date', 'gross tonnage'], ['general cargo ship', 'yes', '83.5152 m (lbp)', '1 june 1980', '2266'], ['general cargo ship / container ship', 'yes', '100.59 100.59 m (loa)', '1997 1997', '4276'], ['petroleum tanker', 'yes', '109.1 109.1 m (loa)', '2001 2001', '3469'], ['deck cargo barge', 'yes', '76.2 76.2 m (lbp)', '1983 1 september 1983', '2529'], ['tugboat', 'yes', '27.7764 27.7764 m (lbp)', '1974 1 september 1974', '189']]
the Deck Cargo Barge and Tugboat were both delivered in the month of September
the [ENT] and [ENT] were both delivered in the month of [ENT]