Question: Which island in Germany is home to the seaside resort named Trassenheide?

Context articles: Margate, KwaZulu-Natal
Fairbourne
St Mary Magdalene's Church, St Leonards-on-Sea
Ravda
Alcamo Marina
Sankt Peter-Ording
States of Germany
Killiney
Trassenheide
Southsea

Margate is a seaside resort town on the KwaZulu-Natal South Coast, about 20 kilometres southwest of Port Shepstone.
 The river which flows into the sea at Margate is called "Nkhongweni" "(place of entreaty)" because the original inhabitants were reputed to be so mean that travellers had to beg for hospitality.
 In 1908, Henry Richardson, an English surveyor laid out the town and named it Margate after another seaside resort on the northern coast of the county of Kent, in the United Kingdom.
Fairbourne is a village on the coast of Barmouth Bay in Arthog community, to the south of the estuary of the River Mawddach in Gwynedd, surrounded by the Snowdonia National Park.
 Before the seaside resort was built the coastal area was known as Morfa Henddol, while the outcrop now occupied by the Fairbourne Hotel was called Ynysfaig.
 Fairbourne was founded as a seaside resort by Arthur McDougall (of flour making fame.)
 It is in an area listed by Gwynedd council for managed retreat due to rising sea levels.
St Mary Magdalene's Church is a Greek Orthodox place of worship in St Leonards-on-Sea, a town and seaside resort which is part of the Borough of Hastings in East Sussex, England.
 Built in 1852 for Anglican worshippers in the growing new town of St Leonards-on-Sea, a seaside resort which had been laid out from the 1820s, the church's prominent position on the skyline overlooking the town was enhanced in 1872 by the addition of a tower.
 No longer required by the Anglican community in the 1980s, it was quickly bought by the Greek Orthodox Church and converted into a place of worship in accordance with their requirements.
 The alterations were minimal, though, and the building retains many of its original fittings and its "archaeologically correct Gothic" exterior which reflected architectural norms of the early Victorian era.
 English Heritage has listed the church at Grade II for its architectural and historical importance.
Ravda (Bulgarian: Равда ) is a coastal village and seaside resort in southeastern Bulgaria, situated in Nesebar municipality, Burgas Province.
 Ravda is a small seaside resort on the Black Sea, located 3 km from Nesebar and 5 km from Sunny Beach.
 30 km from Bourgas airport.
Alcamo Marina is a seaside resort in the north-western part of Sicily and in the town territory of Alcamo.
 It is situated 6 km far from it, about 5 km from the small town of Castellammare del Golfo, 16 km from the village of Scopello, and 49 km from the famous seaside resort of San Vito Lo Capo.
 Alcamo Marina is characterized by a very fine, golden sand beach about 7 km long, absolutely free (except for some little tracts that people can cross near hotels, lidos, etc.).
Sankt Peter-Ording (   ) is a popular German seaside spa and a municipality in the district of Nordfriesland, in Schleswig-Holstein, Germany.
 It is the only German seaside resort that has a sulphur spring and thus terms itself "North Sea spa and sulphur spring".
 By overnight stays, St. Peter-Ording is the largest seaside resort and has the most overnight stays in the state of Schleswig-Holstein.
Germany is a federal republic consisting of sixteen states (German: "Land" , plural "Länder "; informally also "Bundesland ", plural "Bundesländer ").
 Since today's Germany was formed from an earlier collection of several states, it has a federal constitution, and the constituent states retain a measure of sovereignty.
Killiney (Irish: "Cill Iníon Léinín" , meaning "Church of the Daughters of Léinín" ) is an affluent seaside resort and suburb in Dún Laoghaire–Rathdown, Ireland.
 It lies south of neighbouring Dalkey, and north of Shankill.
 The place grew around 11th-century Killiney Church, and became a popular seaside resort in the 19th century.
 It is part of the Dáil Éireann constituency of Dún Laoghaire.
Trassenheide is a seaside resort on the island of Usedom in the state of Mecklenburg-Vorpommern, in Germany.
 Trassenheide has approximately 1,000 inhabitants and the main source of income is tourism.
Southsea is a seaside resort and geographic area, located in Portsmouth at the southern end of Portsea Island, Hampshire, England.
 Southsea is located to the south of Portsmouth city centre and to the east of Old Portsmouth.
 It originally developed as a Victorian seaside resort in the 19th century and grew into a dense residential suburb and large distinct commercial and entertainment area, separate from Portsmouth city centre itself.
 The name of the area originates from Southsea Castle; a fort, located on the seafront and constructed in 1544 to help defend the Solent and approaches to Portsmouth Harbour.