Matches in DBpedia 2014 for { ?s ?p The Helgoland class was the second class of German dreadnought battleships. Constructed from 1908 to 1912, the class comprised four ships: Helgoland, the lead ship; Oldenburg; Ostfriesland; and Thüringen. The design was a significant improvement over the previous Nassau-class ships; they had a larger main battery—30.5 cm (12.0 in) main guns instead of the 28 cm (11 in) weapons mounted on the earlier vessels—and an improved propulsion system.. }
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- Helgoland-class_battleship comment "The Helgoland class was the second class of German dreadnought battleships. Constructed from 1908 to 1912, the class comprised four ships: Helgoland, the lead ship; Oldenburg; Ostfriesland; and Thüringen. The design was a significant improvement over the previous Nassau-class ships; they had a larger main battery—30.5 cm (12.0 in) main guns instead of the 28 cm (11 in) weapons mounted on the earlier vessels—and an improved propulsion system.".