Question: Groningen is located south of a sea located between where? 

Context paragraphs:
Halmahera Sea: Halmahera Sea is a regional sea located in the central eastern part of the Australasian Mediterranean Sea.  It is centered at about 1°S and 129°E and is bordered by the Pacific Ocean to the north, Halmahera to the west, Waigeo and Irian Jaya to the east, and the Seram Sea to the south.  It covers about 95,000 km and its topography comprises a number of separate basins and ridges, the chief of which is the Halmahera Basin reaching a depth of 2039 m.

Natuna Sea: Natuna Sea (Indonesian: "Laut Natuna" ) is an extensive shallow sea located around Natuna Islands extended south to Lingga and Tambelan Archipelago in Riau Islands province, further south of Bangka Belitung Islands, Indonesia.  Most of the sea is located within Indonesian territorial waters, and geologically is the part of Sunda Shelf.  This sea is bordering South China Sea to the north and northeast, Karimata Strait to the southeast, and Strait of Singapore to the west.

Aegean Sea: The Aegean Sea ( ; Greek: Αιγαίο Πέλαγος ] ; Turkish: "Ege Denizi" ] ) is an elongated embayment of the Mediterranean Sea located between the Greek and Anatolian peninsulas, i.e., between the mainlands of Greece and Turkey.  In the north, it is connected to the Marmara Sea and Black Sea by the Dardanelles and Bosphorus.  The Aegean Islands are within the sea and some bound it on its southern periphery, including Crete and Rhodes.

Labrador Sea Water: Labrador Sea Water (LSW) is an intermediate water mass characterized by cold water, relatively low salinity compared to other intermediate water masses, and high concentrations of both oxygen and anthropogenic tracers.  It is formed by convective processes in the Labrador Sea located between Greenland and the northeast coast of the Labrador Peninsula.  Deep convection in the Labrador Sea allows colder water to sink forming this water mass, which is a contributor to the upper layer of North Atlantic Deep Water.  North Atlantic Deep Water flowing southward is integral to the Atlantic Meridional Overturning Circulation.  The Labrador Sea experiences a net heat loss to the atmosphere annually.

Svinoy, Caspian Sea: Svinoy, Sangi-Mugan Island or Muğan daşı (Azerbaijani: "Səngi Muğan" , Russian: "Ostrov Svinoy"), is an island in the Caspian Sea located south of Baku, Azerbaijan.

Marie-Galante: Marie-Galante is an island of the Caribbean Sea located south of Guadeloupe and north of Dominica.  It is a dependency of Guadeloupe, which is an overseas department and an overseas region of France.

Groningen (province): Groningen (] ; Gronings: "Grönnen" or "Grunn"; West Frisian: "Grinslân" ) is the northeasternmost province of the Netherlands.  It borders on Friesland to the west, Drenthe to the south, the German state of Niedersachsen (districts of Leer and Emsland) to the east, and the Wadden Sea to the north.  In 2014, it had a population of 582,640 and a total area of 2960 km2 .

Busuanga Island: Busuanga, is the largest island in the Calamian Group of islands in the province of Palawan in the Philippines.  Busuanga Island is the second largest island in the province after Palawan island itself.  The island is located halfway between the islands of Mindoro and Palawan with the South China Sea located to the west and the Sulu Sea to the southeast.  South of the island are the two other major islands of the Calamian Group: Culion Island and Coron Island.

Wadden Sea: The Wadden Sea (Dutch: "Waddenzee" , German: "Wattenmeer" , Low German: "Wattensee" or "Waddenzee ", Danish: "Vadehavet" , , North Frisian: "di Heef" ) is an intertidal zone in the southeastern part of the North Sea.  It lies between the coast of northwestern continental Europe and the range of Frisian Islands, forming a shallow body of water with tidal flats and wetlands.  It is rich in biological diversity.  In 2009, the Dutch and German parts of the Wadden Sea were inscribed on UNESCO's World Heritage List and the Danish part was added in June 2014.

Scotia Sea: The Scotia Sea is a sea located at the northern edge of the Southern Ocean at its boundary with the South Atlantic Ocean.  It is bounded on the west by the Drake Passage and on the north, east and south by the Scotia Arc, an undersea ridge and island arc system supporting various islands.  The sea sits atop the Scotia Plate.  Named after the expedition ship "Scotia".

Supporting paragraphs: Groningen (province) Wadden Sea
Answer: Europe and the range of Frisian Islands